Users are no longer able to connect to a relay server for outgoing mail through the
Atmail webmail on Plesk 12.
There are several authentication failures and disconnect messages in
Feb 26 05:00:29 host postfix/smtpd: NOQUEUE: reject: RCPT from localhost.localdomain[127.0.0.1]: 554 5.7.1 <firstname.lastname@example.org>: Relay access denied; from=<email@example.com> to=<firstname.lastname@example.org> proto=ESMTP helo=<webmail.example.com>
Feb 26 05:00:29 host courier-imapd: DISCONNECTED, email@example.com, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=45, sent=380, time=0
Feb 26 05:00:29 host postfix/smtpd: lost connection after RCPT from localhost.localdomain[127.0.0.1]
Feb 26 05:00:29 host postfix/smtpd: disconnect from localhost.localdomain[127.0.0.1]
This error appears while trying to send message using
Could not send message to SMTP server. Check you have access to send messages via the server and that all To/CC/BCC addresses are valid
Error: SMTP Server rejected email. Returned:554 5.7.1 <firstname.lastname@example.org>: Relay access denied
Unable to install
Warning: following component(s) not found: 'psa-atmail'
Atmail webmail is no longer supported by Plesk.
Consider switching to supported
Roundcube webmail clients:
Install supported webmail client using
autoinstaller and switch domains to it in Home > Subscriptions > Domain.tld > Mail > Mail Settings - Webmail
The following KB article can also be useful:
213364749 Cannot send mail using Outlook: 554 5.7.1 : Client host rejected: Access denied.