Problems after changing qmail to Postfix

[iLLogical]

Hello out there,

now it's the time to register myself at these forums and ask you a question:
I recently switched my Plesk installation from qmail to Postfix. Obviously everything went as expected, but after a few tests we have some strange complications with sending mails.

When I try to use SSL for connecting the SMTP server it fails with the error message: "No authentication method supported by the server"
Another strange thing is, that running the rebuild command for the config returns an error, but I can't reproduce why.

root@srv01 ~ # /usr/local/psa/admin/sbin/mchk
==> Checking for: mailsrv_conf_init... ok
==> Checking for: mail_handlers_init... ok
==> Checking for: mailsrv_entities_dump... ok
==> Checking for: mail_admin_aliases... ok
==> Checking for: mail_auth_dump... [B]fail[/B]
==> Checking for: mailman_lists_dump... ok
==> Checking for: mail_kav8_restore... ok
==> Checking for: mail_responder_restore... ok
==> Checking for: vhostidmng... ok
==> Checking for: mail_postfix_transport_restore... ok
==> Checking for: mail_spam_restore... ok
==> Checking for: mail_grey_restore... ok
==> Checking for: mail_mailbox_restore... ok
==> Checking for: mail_spf_restore... ok
==> Checking for: mail_dk_restore... ok
==> Checking for: mail_drweb_restore... not exists
Errors occured in mail restore procedure
Some utilities have exited with errors:
  /usr/lib/plesk-9.0/mail_auth_dump

Looking up the exit code of this script returns the following

root@srv01 ~ # /usr/lib/plesk-9.0/mail_auth_dump; echo $?;
255

Have anybody any kind of idea what I could do to fix these problems?

Best regards,
iLLogical

 

[IgorG]

Any related error messages in Plesk maillog?

 

[iLLogical]

There only seems a problem with SpamAssasin

Nov 19 07:42:32 srv01 spamd[8336]: error creating a DNS resolver socket: Network is unreachable at /usr/share/perl5/Mail/SpamAssassin/DnsResolver.pm line 235.
Nov 19 07:42:32 srv01 spamd[8336]: plugin: eval failed: error closing socket: Bad file descriptor at /usr/share/perl5/Mail/SpamAssassin/DnsResolver.pm line 568.
Nov 19 07:48:28 srv01 spamd[8337]: plugin: eval failed: error closing socket: Bad file descriptor at /usr/share/perl5/Mail/SpamAssassin/DnsResolver.pm line 568, <GEN12> line 23.

But I can't reproduce why the mchk is throwing an error at the auth-section.
It only happend, that sometimes the SSL-Authentication with Microsoft Outlook @ Windows didn't work.
At Android and Mac Outlook it works.