Which email providers support custom domains in 2026?

How many providers allow a custom domain at all?

Eleven of the 14 providers in the index allow a custom domain on at least one plan. They are Proton Mail, Tuta, Mailbox.org, Fastmail, StartMail, Mailfence, Infomaniak, Migadu, Zoho Mail, iCloud+ and Purelymail.

Three do not or could not be confirmed. Posteo does not support custom domains, according to a Privacy Guides forum thread and a vendor blog, because its own help page could not be read. Skiff is gone: Notion acquired it in February 2024 and the service was shut down. For Disroot and Riseup, a search found nothing either way, so we state nothing.

Only one of the eleven offers a free plan with your own domain: Zoho Mail Free, which allows 1 domain and up to 5 users with 5 GB each, without IMAP, POP or Exchange ActiveSync, and where a sixth user pushes everyone onto a paid plan. The page on whether Proton Mail Free supports custom domains covers the best-known free plan that does not.

How many providers cost under $5 a month with a custom domain?

Six providers have a plan with a custom domain under $5 a month, counting euro prices at face value. According to Postelva's index of 12 November 2026, they are Zoho Mail Free ($0), Purelymail ($10 a year), Migadu Micro ($19 a year), Proton Mail Plus ($2.49 a month on a 12-month term), Mailbox.org Standard (EUR 3 a month on the yearly plan) and StartMail Personal ($4.99 a month).

Two caveats apply. The Proton figure is a 12-month rate: the list price is $4.99 and the second year costs $47.88, about $3.99 a month. Mailbox.org's EUR 3 is the yearly plan, EUR 4 when billed monthly. Fastmail Individual, at EUR 6 a month or EUR 60 a year, sits above the line.

The price of the mailbox is only half the cost. The domain adds a yearly fee, which at Postelva is $12.49/year for a .com and $7.99/year for a .link, the same every year.

Which providers accept crypto?

Three of the 14 providers take Bitcoin in some form, and none takes Monero directly. Proton Mail accepts Bitcoin as account credit, bought after you create a free account, with no autopay. StartMail takes Bitcoin on annual plans, and you contact it for the price and address. Migadu tells you to contact support for a wallet address, and credits the payment in USD.

Tuta takes no crypto for subscriptions directly: Bitcoin or Monero reach it only through gift cards sold by a partner. Mailbox.org and iCloud+ list cards, PayPal and similar methods, without crypto. For the other providers we found no verified answer.

The domain is a separate purchase everywhere in this index except at Fastmail, iCloud+ and Infomaniak, which sell domains inside the product. We found no crypto option at Fastmail or iCloud+. Postelva accepts BTC, USDT, USDC, ETH, SOL, LTC from a prepaid balance, from $25, so a crypto-paid domain can sit in front of a mailbox paid another way.

Which providers sell the domain too, and why does it matter?

Three providers sell domains inside the product, and buying both from one company ties the address to that company. Fastmail sells .com, .net, .org, .io, .ac and .sh to paid accounts older than 7 days, not on its Basic business plan. iCloud+ buys the domain through Cloudflare as registrar. Infomaniak is itself a registrar. Proton, Tuta, Mailbox.org and Migadu do not sell domains.

A domain bought separately is the part of the address that stays when you leave, as the page on how to keep your email address when changing provider shows. The Proton Mail and Tuta comparison and the setup guides show what changes at each provider when you move.

Postelva sells domains, not mailboxes. Postelva offers one-click DNS templates for Proton Mail, Fastmail, Zoho Mail, Google Workspace and Microsoft 365, plus an SPF + DMARC template and a "no email" template for a domain that sends nothing. Tuta, Mailbox.org, iCloud+ and Migadu have no one-click template: their records are typed in the DNS editor.

How was the index built?

The index uses only pages read on 12 November 2026, and every field we could not read is marked not verified. Postelva compiled it with web search and web fetch, without signing up to any service. Pricing pages read through a summarising tool give paraphrased text, and prices vary by region and currency, so re-check a figure before you pay.

Where a provider's help page was unreachable, as for Posteo, Mailfence and parts of Migadu and Purelymail, the entry rests on secondary sources, and the table says so. We include no provider's marketing claim about itself without a source.