Why is mail sent from VPS (Debian) not getting through?

V

vserg882014-08-10 15:54:05

Network administration

vserg88, 2014-08-10 15:54:05

Good afternoon!
There is a VPS. A domain (mysitedomain.ru) is "attached" to it, which is delegated to Yandex and connected to Yandex.Mail for the domain. The problem is this: letters are not sent via php mail() to mailboxes created for my domain in Yandex. If you send, for example, from mail.ru, then the letters reach normally. If you send to direct addresses [email protected] via mail(), then the letters successfully reach.
mail.log:

Aug 10 16:45:39 mysitedomain postfix/smtp[29692]: 2C1B5DC0180: to=<[email protected]>, orig_to=<[email protected]>, relay=mx.yandex.ru[93.158.134.89]:25, delay=0.11, delays=0.01/0/0.05/0.05, dsn=5.7.1, status=bounced (host mx.yandex.ru[93.158.134.89] said: 550 5.7.1 No such user! (in reply to RCPT TO command))
Aug 10 16:45:39 mysitedomain postfix/smtp[29692]: 2C1B5DC0180: to=<error:[email protected]>, orig_to=<[email protected]>, relay=mx.yandex.ru[93.158.134.89]:25, delay=0.11, delays=0.01/0/0.05/0.05, dsn=5.1.3, status=bounced (host mx.yandex.ru[93.158.134.89] said: 501 5.1.3 Bad recipient address syntax. (in reply to RCPT TO command))
Aug 10 16:45:39 mysitedomain postfix/smtp[29692]: 2C1B5DC0180: to=<[email protected]>, orig_to=<[email protected]>, relay=mx.yandex.ru[93.158.134.89]:25, delay=0.11, delays=0.01/0/0.05/0.05, dsn=5.7.1, status=bounced (host mx.yandex.ru[93.158.134.89] said: 550 5.7.1 No such user! (in reply to RCPT TO command))
Aug 10 16:45:39 mysitedomain postfix/smtp[29692]: 2C1B5DC0180: to=<[email protected]>, orig_to=<[email protected]>, relay=mx.yandex.ru[93.158.134.89]:25, delay=0.11, delays=0.01/0/0.05/0.05, dsn=5.7.1, status=bounced (host mx.yandex.ru[93.158.134.89] said: 550 5.7.1 No such user! (in reply to RCPT TO command))
Aug 10 16:45:39 mysitedomain postfix/smtp[29692]: 2C1B5DC0180: to=<[email protected]>, orig_to=<[email protected]>, relay=mx.yandex.ru[93.158.134.89]:25, delay=0.11, delays=0.01/0/0.05/0.05, dsn=5.7.1, status=bounced (host mx.yandex.ru[93.158.134.89] said: 550 5.7.1 No such user! (in reply to RCPT TO command))

It happened after moving to VPS from shared hosting. Everything was working fine before the move.
Tell me where to dig, what to look at?

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Ivan, 2014-08-10
@0neS

550 5.7.1 No such user!
501 5.1.3 Bad recipient address syntax
help.yandex.ru/mail/support.xml#yandex-undelivered...

If the report contains the following lines, the email was sent to a non-existent address:
"No such user";
"No correct recipients";
"Bad recipient address syntax";
"Bad address mailbox syntax";
"Recipient address rejected: need fully-qualified address".
Make sure the recipient's address doesn't contain extra punctuation, spaces, or quotation marks. Check the address with the recipient again and resend the letter.