SMTP Fehler (): Die Authentisierung ist fehlgeschlagen.

[syswombat]

Hello
after upgrading the Web/Mail server to bookworm i got a error sending emails

SMTP Fehler (): Die Authentisierung ist fehlgeschlagen.

but receiving works still fine

the server setting is just localhost

have a nice day
vinc

[Dmitry42]

So check your smtp server settings ....without log or any additional information nothing to say