• The BIND DNS server has already been deprecated and removed from Plesk for Windows.
    If a Plesk for Windows server is still using BIND, the upgrade to Plesk Obsidian 18.0.70 will be unavailable until the administrator switches the DNS server to Microsoft DNS. We strongly recommend transitioning to Microsoft DNS within the next 6 weeks, before the Plesk 18.0.70 release.
  • The Horde component is removed from Plesk Installer. We recommend switching to another webmail software supported in Plesk.

Question Warnings in mail log [SASL LOGIN authentication failed]

A

andrecab93

New Pleskian
Server operating system version
Ubuntu 22.04.3 LTS
Plesk version and microupdate number
Version 18.0.58 Update #2
I check this information in the email logs several times:
2024-02-02 13:23:14WARNINGpostfix/smtpd [3512567]warning: unknown[IPXXXX]: SASL LOGIN authentication failed: authentication failure
2024-02-02 13:23:14WARNINGplesk_saslauthd [3512587]failed mail authentication attempt for user '[email protected]' (password len=9)

2024-02-02 13:22:37WARNINGpostfix/smtpd [3512567]warning: unknown[IPXXXX]: SASL LOGIN authentication failed: authentication failure
2024-02-02 13:22:37WARNINGplesk_saslauthd [3512569]failed mail authentication attempt for user 'glendali' (password len=9)

and so on, does anyone know how to solve it? I already have fail2ban activated but it's still there, is that normal?
 
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