Verifying Yandex and Mail.ru Addresses: Two Russian Providers, Two Different Answers
Yandex and mail.ru are both big Russian-language providers, and they answered our check in opposite ways. On 23 October 2026 yandex.ru rejected a made-up address at the recipient step, twice, so its answer is informative. mail.ru accepted the same kind of address both times, so a yes from mail.ru confirms nothing. The full table is in how 51 mailbox providers answered a verification check.
This is a good example of why one rule for "Russian providers" does not work. Each provider decides for itself.
What you will see for Yandex
A Yandex check can return a definite answer. An address that does not exist comes back as invalid with "Mailbox not found", and one that does exist comes back valid. Because the server has shown it will say no, a yes carries weight.
What you will see for mail.ru
A mail.ru check returns risky with "Accepts all addresses". The server accepted an address that could not exist, so its acceptance of yours is not proof. That is the same behaviour as a catch-all domain, even though mail.ru is not a company domain. See what a catch-all domain is.
| Provider (domain tested) | Result in our test | Reason shown | What to do |
|---|---|---|---|
| Yandex (yandex.ru) | Invalid for the made-up address | Mailbox not found | Trust valid and invalid |
| mail.ru | Risky | Accepts all addresses | Segment, test, cap the volume |
What still works on mail.ru
The checks that do not depend on the mailbox still run. The result also flags typo domains, role addresses and disposable domains, and confirms the domain has working mail servers. A mail.ru address with a typo in the domain is caught even though the mailbox cannot be confirmed.
Sending to a mixed list
Build one segment per outcome. Send the valid Yandex addresses normally. Send the mail.ru ones in a small batch first and measure bounces before scaling. If the batch is clean, grow the volume in steps. The same method is described for catch-all domains in what to do with catch-all emails.
Also remember that language and region should drive the copy and the sending time. A list with Russian-language contacts is a different audience from a list of US freemail users.
What a check cannot tell you
- Whether a mail.ru address is real.
- Whether the person reads the inbox.
- How other domains in the same families are set up.
- Whether either provider changes its rules after our test.
Run a sample
Check a few on the verify page: the first 100 email checks are free with a Google sign-in, no card. Each comes back valid, risky or invalid with a reason, and nothing is sent to anyone on the list. For a full list, see bulk email verification, list cleaning and pricing.
The free Yandex address checker covers a single Yandex address.
Common questions
Can you verify a Yandex email address?
Usually. In our October 2026 test yandex.ru refused a made-up address at the recipient step in both rounds, so a check returns Mailbox not found (invalid) for an address that does not exist, and the answer comes from Yandex.
Can you verify a mail.ru address?
Not with a mailbox check alone. In the same test mail.ru accepted a made-up address in both rounds. A server that says yes to everything cannot confirm a real address, so mail.ru addresses come back risky with Accepts all addresses.
Do other Yandex and mail.ru domains behave the same way?
Not necessarily. We tested one domain at each provider. Other domains in the same families, and business domains hosted by them, can be set up differently.
Should I remove all mail.ru addresses because they are risky?
No. Risky means unconfirmed, not bad. Keep them as a separate segment, send a small test batch and remove any that bounce.
Is there anything to check apart from mailbox status?
Yes. Typos in the domain, role addresses and disposable domains are all checked without needing the mailbox, so those parts of the result stay useful on mail.ru.
Check your list before you send
Real mailbox checks over SMTP, and nothing is sent to the address. Sign in with Google and your first 100 email checks are free, no card. Plans for bigger lists are on the pricing page.