How to set up SimpleLogin with a custom domain?

Which SimpleLogin plan do you need for your own domain?

The Premium plan is the one that lists custom domains; the free plan does not. On SimpleLogin's pricing page read on 12 November 2026, Free cost $0 with 10 aliases and one mailbox, while Premium cost $36 a year or $4 billed monthly and listed unlimited aliases, unlimited mailboxes, unlimited custom domains, catch-all domains and 5 subdomains. The page names Bitcoin and Monero as crypto options, sold through a reseller called ProxyStore, besides cards and PayPal through Paddle.

That split is useful. SimpleLogin never stores your mail, it relays it, so the domain is the permanent part of your address and the plan is the replaceable part. A .com bought at Postelva costs $12.49/year every year, paid with BTC, USDT, USDC, ETH, SOL, LTC, and it stays yours if you later switch from SimpleLogin to a mailbox host. The reasoning is laid out in what is a custom email domain.

Why does the documentation show one DKIM record in one guide and three in another?

SimpleLogin's Namecheap guide lists a single DKIM CNAME, while its Cloudflare guide lists three. Both were read on 12 November 2026. The Cloudflare page names dkim, dkim02 and dkim03 under _domainkey, each pointing to the same label on simplelogin.co, and requires them to be set to DNS only if you use Cloudflare's proxy. Publishing all three matches the most complete list. Always compare your list with the one on your own SimpleLogin DNS page, which is the authority for your account.

The same guides mark SPF, DKIM and DMARC as optional. They are optional for receiving, because forwarding only needs the MX records, but sending as an alias needs them for deliverability. Read SPF vs DKIM vs DMARC for the role of each, and how to set up DKIM for the selector logic.

How do catch-all and auto-create work on your domain?

With Catch All enabled, any address at your domain creates an alias the first time it receives mail. SimpleLogin's domain management page describes this in the domain's Info options, together with Auto Create, which restricts what gets created by a regular expression. Deleted aliases on a custom domain can be restored from a Deleted Alias list. Once the DNS is verified your domain also appears on the New Custom Alias page.

Giving each website its own address on your domain makes a leak traceable to the site that sold your data, and the broader pattern is covered in how to use a catch-all address and aliases. To confirm that every record is live from the outside, follow how to check MX, SPF, DKIM and DMARC records.

How many records does SimpleLogin need compared with a mailbox provider?

SimpleLogin needs eight records in the complete list, one more than the seven that addy.io needs. According to Postelva's survey of 12 November 2026, the SimpleLogin list in this guide has 8 lines, of which only the 2 MX records are strictly needed to receive forwarded mail, and a .com costs $12.49/year at Postelva in the first year and every year after.

The Postelva DNS editor supports free DNS hosting with A, AAAA, CNAME, ALIAS, MX, TXT, NS, SRV and CAA records, DNSSEC, and your own nameservers if you prefer (2 to 13), so every type in the table can be entered, and 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 exist for the providers that have one; SimpleLogin is not among them, so you type its records by hand. usually within minutes of the top-up being credited.

SimpleLogin uses two MX records for a custom domain, mx1.simplelogin.co at priority 10 and mx2.simplelogin.co at priority 20, plus an ownership TXT that is different for every account.