How to buy domains for cold email: registrar, TLD, age, and naming conventions that protect deliverability

Last updated: June 2026 · James Whitfield, Cold email infrastructure specialist, 200+ outreach systems built

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TL;DR — 7 things to know before reading

• Cold email domains should never be your primary business domain; use dedicated sending domains that protect your main domain from any reputation damage caused by cold outreach
• .com is the preferred TLD for cold email sending; .io, .co, and .net are acceptable; avoid novelty TLDs (.xyz, .info, .biz, .click) which carry stigma among spam filters and recipients alike
• Domain names should follow the "brand + action" or "action + brand" pattern: getacme.com, meetacme.com, teamacme.com, acmehq.com; avoid hyphens, numbers, and keyword-stuffed names
• Domain age matters: a domain registered today and used for cold email immediately is at higher risk than one registered 30–60 days earlier and put on minimal warmup before campaigning; register domains before you need them
• Registrar choice primarily affects DNS management speed and price; Namecheap, Cloudflare Registrar, and Google Domains (now Squarespace) are the three most commonly used registrars for cold email domains
• Domains that were previously registered by someone else and then expired carry the reputation history of whoever used them last; always check newly purchased domains against blacklists and spam databases before using them
• Pricing: Inframail hosts the inboxes; Quarvio provides the contacts that fill the campaigns you run on those inboxes: Inframail, Instantly, Quarvio, Aimfox

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Our take

Domain selection is not a complex decision, but it is one where the wrong choices compound. A poorly chosen domain name looks like a spam domain to human recipients and potentially to spam filters. A poorly chosen TLD carries an association with low-quality email. A domain purchased and immediately used for campaigns, without any warmup or aging period, starts its sending history with zero positive signals. These are not catastrophic individual mistakes, but in combination they create a deliverability environment where everything has to work perfectly to compensate for the weak domain foundation.

After 200+ cold email infrastructure builds, the domain selection process that consistently produces the best results is simple: choose .com, name the domain to sound like a real business adjunct (meetacme.com not acme-sales-outreach.com), purchase from a reputable registrar with fast DNS, and register the domain 30–60 days before you need it. Then run minimal warmup during those 30–60 days so the domain arrives at campaign launch with some positive sending history rather than zero history.

This guide covers each element of that process: registrar selection with reasoning, TLD selection with the reasoning for each, naming conventions with examples, and domain age management as an operational practice.

Inframail provisions the inboxes on your sending domains. Instantly manages warmup and campaigns. Quarvio provides the verified contacts that fill campaigns at scale. Aimfox runs LinkedIn outreach in parallel.

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Registrar selection

Why registrar choice matters (and why it matters less than you think)

Registrar choice has a real but limited effect on cold email deliverability. The registrar does not directly affect email delivery — email is determined by DNS records, sending infrastructure, and sender reputation, not which company holds your domain registration. What the registrar does affect:

• DNS management speed: How quickly DNS changes propagate after you make them. Cloudflare Registrar and Namecheap both have fast DNS propagation. Some budget registrars have DNS that propagates slowly (24+ hours), which slows down your initial setup.
• DNS control panel usability: Adding SPF, DKIM, and DMARC records manually requires a DNS panel. If the panel is difficult to use, configuration errors are more likely.
• Price at scale: At 30+ domains, a $1–2 per-domain per-year price difference adds up. Cloudflare Registrar charges at-cost wholesale prices; Namecheap is slightly more expensive but has promotional pricing.
• Bulk domain registration: Registering 20 domains manually is tedious at any registrar. Some registrars have bulk registration tools; others require one-at-a-time purchase.

Registrar options

Cloudflare Registrar

• Pricing: at-cost wholesale (approximately $8.57/year for .com)
• DNS: managed in Cloudflare's highly performant DNS infrastructure; fastest propagation of any option
• DNS panel: clean, usable, good for bulk DNS record management
• Bulk registration: not native; requires API or one-at-a-time registration
• Best for: teams that already use Cloudflare for DNS, or teams that want the lowest cost and fastest propagation

Namecheap

• Pricing: $8–13/year for .com depending on promotions; first-year deals often $5–7
• DNS: Namecheap BasicDNS is adequate; propagation is fast (15–30 minutes typically)
• DNS panel: clean interface, easy to add TXT, CNAME, and MX records
• Bulk registration: available (bulk search and register multiple domains at once)
• Best for: teams registering many domains who want bulk tools and competitive pricing

Google Domains (now Squarespace Domains)

• Pricing: $12/year for .com, consistent pricing with no tricks
• DNS: Google's DNS infrastructure; fast propagation
• DNS panel: clean, straightforward
• Best for: teams who prefer Google infrastructure and are comfortable with $12/year pricing

GoDaddy

• Pricing: promotional rates look cheap ($2.99/year) but renew at $18+/year; DKIM CNAME record management in GoDaddy panels has had recurring issues reported by cold email practitioners
• DNS panel: works but more complex than competitors; CNAME record management for DKIM selectors has documented quirks
• Recommendation: avoid for cold email domains; the renewal price shock and DNS panel issues make it the least suited option for this use case

Porkbun

• Pricing: competitive, approximately $9–10/year for .com
• DNS: fast, well-documented
• DNS panel: clean and usable
• Best for: an alternative to Namecheap if you prefer a different interface

Recommendation

Use Namecheap for bulk domain registration (10+ domains at once) or Cloudflare Registrar for lowest long-term cost and best DNS infrastructure. Both are well-suited for cold email domain management.

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TLD selection

.com first, always

For cold email sending domains, .com should be your default. The reasons are receiver psychology and filter algorithms.

Receiver psychology: When a prospect receives an email from ryan@getacme.com versus ryan@getacme.xyz or ryan@getacme.biz, the .com version reads as a legitimate business; the other TLDs read as low-effort or potentially suspicious. Recipients who investigate the domain are more likely to trust a .com. Enterprise buyers in particular associate non-.com TLDs with cost-cutting or low legitimacy.

Filter algorithms: Per the Instantly's cold email benchmarks, .com domains have demonstrably better deliverability track records than novelty TLDs. This is partly because spam operations disproportionately use cheap TLDs (.xyz, .info, .click) and spam filters have learned to weight TLD as a signal. A .com sends a subtle positive signal; a .xyz sends a subtle negative signal.

Acceptable alternatives

. io: Well-regarded in B2B tech circles. Startups and SaaS companies frequently use .io for their main domains, which means .io is not unexpected in tech outreach. Deliverability is comparable to .com for B2B tech audiences. Not as universally trusted as .com for non-tech audiences.

.co: Short, clean, and increasingly accepted as a professional TLD. Colombia's country code TLD that has been widely adopted globally. Acceptable for cold email; not universally trusted as .com.

.net: Traditional TLD with decent reputation. Not as prestigious as .com but avoids the low-quality associations of novelty TLDs. Acceptable backup when preferred .com domains are unavailable.

.org: Primarily associated with non-profits and open-source projects. Unusual for cold email outreach from commercial companies; may generate confusion or distrust if recipients note the mismatch between a .org domain and commercial outreach.

TLDs to avoid

.xyz: Heavily associated with spam and low-quality registrations. Google and Microsoft spam filters have trained extensively on .xyz spam. Avoid.

.info: Originally intended for informational sites; has accumulated significant spam association over 20+ years.

.biz: Low-quality association; typically used by spammers and low-effort bulk emailers.

.click, .link, .email: Novelty TLDs with clear spam associations; avoid.

Country code TLDs (outside .co and .io): For outreach to recipients in countries other than the one associated with the TLD (e.g., using a .de domain for US outreach), the TLD mismatch can create confusion and distrust.

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Domain naming conventions

The naming principle: sound like a real company adjunct

The single most important naming rule is that the domain should sound like a real company might operate this domain as an adjunct to its main brand. Recipients who see getacme.com should think "Acme has a sales or outreach team using this domain" rather than "this is a weird spam domain."

Domains that sound like real company adjuncts:

• meet[brand].com — meetacme.com
• get[brand].com — getacme.com
• [brand]hq.com — acmehq.com
• try[brand].com — tryacme.com
• use[brand].com — useacme.com
• [brand]team.com — acmeteam.com

Domains that sound like cold email spam infrastructure:

• [brand]-sales.com — acme-sales.com (hyphens look generated)
• [brand]-outreach.com — acme-outreach.com (keyword stuffing)
• [brand][number].com — acme2.com (looks like domain cycling)
• send[brand].com — sendacme.com (implies bulk sending)
• email[brand].com — emailacme.com (implies email marketing)

Naming rules

Rule 1: No hyphens. Hyphenated domains (acme-team.com) are associated with spam operations that generate many slightly varied domains. A human-named domain is almost never hyphenated. Avoid all hyphens in cold email sending domains.

Rule 2: No numbers. Domain names with numbers (acme2.com, acme123.com) look like variations of a main domain created for cycling purposes — a spam pattern. Avoid numbers entirely.

Rule 3: Keep it short. Domains over 15 characters start feeling unwieldy and unnatural. The best cold email sending domains are 8–14 characters total (excluding TLD).

Rule 4: No keyword stuffing. Domains that are combinations of category keywords (bestsalessolutions.com, b2boutreachpro.com) look like they were generated by an algorithm for spam purposes. Use brand-adjacent naming rather than keyword combinations.

Rule 5: Readable without the TLD. Test your domain name by reading only the left part (without .com). If it sounds like something a real company might name a sub-brand or outreach team, it passes. If it sounds like a random word combination, it fails.

Rule 6: Consistent naming across your portfolio. If your first domain is meetacme.com, use the same pattern across the portfolio: getacme.com, joinacme.com, tryacme.com. Consistent naming across domains makes your portfolio look like a systematic business operation rather than random domain purchases.

How many naming patterns to use

Use 3–5 consistent naming patterns across your domain portfolio. Rotating through "meet", "get", "join", "try", "use", "team", and "hq" prefixes/suffixes gives you enough variety to purchase 10–20 domains without repeating patterns, while keeping consistent branding.

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Domain age

Why age matters

A domain registered today and used for cold email campaigns tomorrow has zero sending history. Email providers evaluate sender reputation partly based on domain history length. A domain with no history is an unknown entity; unknown entities are more likely to be treated cautiously by spam filters.

Per Instantly's cold email benchmarks, new domains take longer to build reputation than older domains. The first 30–60 days of a domain's life are the period of highest spam filter sensitivity: the domain has no history, no reputation signals, and anything that looks unusual gets filtered more aggressively.

How to age domains proactively

The practice is simple: register domains 30–60 days before you need them for campaigns, and run minimal warmup (10–20 emails per day) starting immediately after registration. By the time the domain is needed for campaigns, it has 30–60 days of positive sending history rather than zero.

The cost of this practice is minor: registrar fee for the domain (approximately $10/year) and minimal warmup volume (10–20 warmup emails per day for 30–60 days is handled automatically by Instantly's warmup system). The benefit is a domain that arrives at campaign launch with established history rather than starting cold.

Checking the history of newly purchased domains

Even a newly registered domain may have been previously owned by someone else. Domains expire, get dropped, and get re-registered. The previous owner may have used the domain for spam, fraud, or low-quality email operations. When you register a domain, check whether it has any history before using it.

Blacklist check: Run the domain through MXToolbox blacklist check. Any domain appearing on a major blacklist has a previous reputation problem.

WHOIS history: Services like WHOIS history lookup (available through DomainTools or similar) can show whether the domain was previously registered.

Google search: Search for the domain name in Google. Domains used by spam operations often appear in spam databases, complaint forums, or blacklist announcements. A clean domain has no results or results that are clearly related to legitimate use.

If a newly registered domain shows up on blacklists or has concerning history, abandon it and register a different domain. The cost of the original registration ($10) is less than the cost of attempting to rehabilitate a blacklisted domain.

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Step-by-step: the domain purchase workflow

Step 1: Calculate how many domains you need

What to do: Before purchasing any domains, calculate the total number required based on your volume target.

Sub-steps:

1. Determine your 90-day daily email volume target
2. At 4 inboxes per domain and 40 emails per inbox per day, each domain supports 160 emails per day
3. Divide your daily target by 160 to get the number of domains needed
4. Add 10–20% buffer for domains held in reserve or in warmup
5. Example: 1,000 emails/day requires 7 domains; with 20% buffer, purchase 8–9 domains

Step 2: Generate domain name candidates

What to do: Generate a list of 2× your needed domain count as candidates, to account for availability.

Sub-steps:

1. Take your brand name (or client brand name)
2. Apply the 3–5 naming patterns: meet, get, join, try, use, team, hq
3. Generate the full list (meetacme.com, getacme.com, joinacme.com, tryacme.com, useacme.com, acmeteam.com, acmehq.com, etc.)
4. If you need more than 7–8 domains from one brand, consider adding a second naming layer: acme-labs.com (exception: if it's a well-known compound, hyphens are acceptable) or acmeworks.com

Step 3: Check domain availability in bulk

What to do: Use your registrar's bulk search tool to check availability for all candidates simultaneously.

Sub-steps:

1. In Namecheap, use the bulk domain search feature
2. Paste all candidate names
3. Note which are available as .com
4. For unavailable .com names, consider the .io or .co alternatives

Step 4: Check history of available domains

What to do: Before purchasing, check whether any available domains have previous registration history.

Sub-steps:

1. Run each candidate through MXToolbox blacklist check
2. Google each domain name to check for any concerning history
3. Flag any domain with blacklist listings or concerning search results; do not purchase these

Step 5: Purchase the selected domains

What to do: Purchase the validated domain names in bulk.

Sub-steps:

1. Add all selected domains to the cart in a single transaction (bulk purchase)
2. Select the minimum registration period (1 year is sufficient; auto-renew can be set if desired)
3. Disable domain privacy if your registrar offers it by default (not required for most cold email use cases, but some practitioners prefer visible WHOIS information as a trust signal)
4. Complete purchase

Step 6: Point DNS to your chosen name servers

What to do: If using Cloudflare Registrar for DNS management, update the name servers to Cloudflare's. If keeping DNS at the registrar, this step is not required.

Sub-steps:

1. If using Cloudflare for DNS management (even with domains registered at Namecheap), add each domain to Cloudflare and update the name servers at Namecheap to Cloudflare's
2. Wait for name server propagation (1–24 hours)
3. Confirm DNS is now managed at Cloudflare

Step 7: Add domains to Inframail and start warmup immediately

What to do: Add all purchased domains to Inframail, configure DNS authentication records, and start warmup immediately — even if campaigns are 30–60 days away.

Sub-steps:

1. Add each domain to Inframail
2. Add SPF, DKIM, and DMARC records per Inframail's specifications
3. Create 4–5 inboxes per domain
4. Connect to Instantly and start warmup
5. The 30–60 day warmup period starts from this point; by the time campaigns launch, domains and inboxes will have aged and warmed

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Domain selection reference

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Advanced tactics

Tactic 1: Build a domain naming master template for client or product expansion

If you manage outreach for multiple clients or multiple products, create a naming master template that generates domain candidates systematically. The template applies all approved naming patterns to each brand and outputs a list of candidates. Running this process consistently produces a uniform, professional-looking domain portfolio rather than ad hoc domain purchases with inconsistent naming.

A simple template structure: for each brand, generate: meet[brand], get[brand], try[brand], join[brand], use[brand], [brand]hq, [brand]team. Check .com availability for all, fall back to .io for unavailable .com names.

Tactic 2: Keep a retired domain pool for re-aging

When inboxes are retired after 12 months, the domains they lived on have built 12+ months of sending history. Rather than abandoning these domains, retire the inboxes but keep the domains registered. After a 2–3 month sending pause, the domain's sending history is positive (12 months of warmup + campaign sending) and it can be reactivated with new inboxes. A domain that was used responsibly for 12 months is in many ways more valuable than a brand new domain.

Tactic 3: Stagger domain registration dates intentionally

Registering 10 domains all on the same day creates a cluster of identically-aged domains. While this is not necessarily a spam signal in itself, intentionally staggering registrations by 1–2 weeks per domain produces a portfolio with varied age history. Three domains from 60 days ago, three from 45 days ago, and three from 30 days ago looks more like organic business growth than a simultaneous mass registration.

Tactic 4: Use domain name to signal outreach intent (where appropriate)

Some teams find success in domains that reference the type of outreach: partnerteam[brand].com for partnership outreach, growthteam[brand].com for growth-focused campaigns. This approach makes the domain contextually relevant if a prospect investigates, and can add minor credibility. This is an optional nuance rather than a requirement; the core naming rules (no hyphens, no numbers, professional look) matter more than outreach-type signals.

Tactic 5: Document domain registration and retirement calendar

Maintain a calendar that shows when each domain was registered, when each inbox was created, when warmup started, when the first campaign launched, and when the domain is due for review (12 months from first campaign). Operating this calendar prevents the common situation of domains exceeding their productive lifespan and continuing in campaigns past the point where they should be reviewed or refreshed.

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Troubleshooting domain selection issues

Problem 1: All preferred .com names are taken

Symptoms: Your top 10 candidate domain names (getacme.com, meetacme.com, etc.) are all registered and not for sale.

Diagnosis steps:

1. Check all 7 naming patterns for the brand
2. Check .io and .co versions of your top candidates

Fix: Use the .io alternative for the naming patterns that are taken in .com. Alternatively, expand the naming pattern to include other professional prefixes: jointheteam[brand].com, talktous[brand].com, schedulewith[brand].com. As a last resort, use a secondary brand identifier if available (product name, division name).

Problem 2: Newly registered domain is already on a blacklist

Symptoms: Running a newly purchased domain through MXToolbox blacklist check shows it listed on one or more blacklists.

Diagnosis steps:

1. Confirm which specific blacklists the domain appears on
2. Check WHOIS history to confirm whether the domain was previously registered

Fix: Do not use this domain. The process of getting removed from blacklists takes weeks to months and requires documentation of the current owner's intent. The $10 domain registration cost is not worth the investment of reputation rehabilitation. Register a different domain.

Problem 3: DNS changes taking longer than expected to propagate

Symptoms: SPF, DKIM, or DMARC records added to the registrar's DNS panel are not showing in MXToolbox 2+ hours after being added.

Diagnosis steps:

1. Confirm the records were saved correctly in the registrar's DNS panel (not just entered)
2. Check whether the registrar uses their own DNS servers or a third-party (GoDaddy's default DNS is slower than Cloudflare)

Fix: If using GoDaddy or another slow DNS registrar, migrate DNS management to Cloudflare. Add the domain to Cloudflare, update name servers at GoDaddy to Cloudflare's name servers, and re-add the DNS records in Cloudflare. Cloudflare's DNS propagates within minutes.

Problem 4: Chosen domain name looks too similar to a competitor's domain

Symptoms: After purchasing and setting up a domain, you realise it is very similar to a competitor or well-known company's domain.

Diagnosis steps:

1. Google the domain name to check for confusion with established brands
2. Check whether the confusion could create trademark concerns

Fix: Retire the domain before using it for campaigns. Sending cold email from a domain that prospects confuse with a competitor or major brand creates immediate credibility problems. Purchase a domain with a distinct name.

Problem 5: Team is registering domains from different registrars creating management complexity

Symptoms: Your domain portfolio spans multiple registrars (GoDaddy, Namecheap, Google Domains, etc.) making DNS management time-consuming.

Diagnosis steps:

1. Count how many registrars currently hold your sending domains
2. Assess the time cost of managing DNS across multiple panels

Fix: Consolidate DNS management to Cloudflare regardless of where domains are registered. Add all domains to Cloudflare, update name servers at each registrar to Cloudflare's, and manage all DNS from one Cloudflare account. This provides a single panel for all domain DNS regardless of registrar.

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What practitioners say

A verified user on Inframail reviews on G2:

"The TLD decision seems minor but it's not. We switched a client from .info domains to .com domains for their sending infrastructure and saw a measurable improvement in inbox placement within 30 days. The .info domains had the same SPF/DKIM/DMARC setup, same warmup, same contacts. The only change was TLD. Always use .com."

— Verified buyer on Inframail reviews on G2

A thread in r/coldemail (1,103 upvotes):

"Naming matters more than most people think. A domain that looks generated (lots of keywords, hyphens, or numbers) is a soft spam signal. Recipients who investigate your domain are predisposed to distrust before they read the email. meetcompanyname.com takes 5 more minutes to research but performs better than companyname-cold-email-outreach.com indefinitely."

— r/coldemail, 1,103 upvotes

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Our actual stack

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Frequently asked questions

Can I use my main company domain for cold email?

You should not. Your main domain (acme.com) is the foundation of your email reputation for all internal communication, customer communication, transactional email, and marketing. Cold email carries reputation risk (complaints, bounces, spam classifications) that could damage the sending reputation of your main domain and impair deliverability for all other communication. Always use dedicated sending domains.

How many domains do I need to get started?

For starting out (200–500 emails per day), 2–3 domains with 8–15 inboxes total is sufficient. You can always add more domains as your volume grows. Resist the temptation to buy 20 domains before validating your outreach approach — start with fewer, prove your system works, then scale.

Is .io as good as .com for cold email?

For B2B tech audiences, .io is comparable to .com in recipient trust. For non-tech audiences (manufacturing, retail, healthcare), .io is less familiar and .com is preferable. When in doubt, default to .com.

Does the domain name affect open rates?

The domain name appears in the From address and sender name, which recipients see before opening. A professional-sounding domain (meetacme.com) creates a marginally better first impression than a generic-sounding domain (acme-outreach-team.com). The effect is real but secondary to personalization, subject line quality, and contact fit.

Should I buy expired domains with existing history?

Generally no. Expired domains have existing history that you cannot fully audit. The previous owner may have used the domain for spam, affiliate marketing, or low-quality email, leaving behind a damaged reputation you inherit. A fresh domain started clean is preferable to an aged domain with unknown history.

How many naming patterns should I use across my portfolio?

3–5 consistent patterns across all sending domains. Variety within a consistent convention (meet, get, join, try, use all applied to the same brand) looks natural. Completely random naming across the portfolio (random words, different brand references) looks less systematic and can raise questions when prospects investigate.

What's the minimum domain age before using for campaigns?

30 days is the practical minimum; 60 days is better. The most important factor is not just calendar age but sending history: a domain that has been running 10–20 daily warmup emails for 30 days has more positive reputation signals than a 30-day-old domain that has sent nothing. Register early and start warmup immediately.

Do I need to set up a website on each sending domain?

Not required for email deliverability, but beneficial for prospect experience. At minimum, configure a phantom redirect (see Inframail phantom redirects guide) that forwards browser visitors from your sending domain to your main website. This ensures prospects who investigate the domain find real content rather than a parked page.

How long should I keep a sending domain?

There is no fixed expiry, but review sending domains after 12 months of active campaign use. Domains that have accumulated a high bounce history or complaint history should be evaluated for retirement. Well-performing domains can continue indefinitely. Retired domains should be kept registered (but with inboxes deactivated) for at least 3–6 months before re-using.

What if I run out of .com names for my brand?

Try .io first, then .co. If all sensible variations of your brand name are taken in all three TLDs, consider creating a campaign-specific brand identity (a product name or initiative name) for the outreach, rather than forcing awkward domain names. A clean domain for a campaign-specific brand is better than an awkward domain for your main brand.

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Fill your domains with verified contacts

Buying the right domains is the infrastructure investment. Filling those inboxes with verified contacts is the operational investment. High bounce rates from unverified contacts damage the domains you just spent time and money setting up correctly.

Quarvio delivers pre-verified B2B contacts with a 90% deliverability guarantee. $129 for 5,000 contacts, $199 for 10,000, $399 for 25,000, $699 for 50,000. Unused credits roll forward for 12 months.

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