Problems sending email

UCS - Univention Corporate Server
#1

Hi,
When I try to send email, the following error returns:

relay = smtp.gmail.com [64.233.186.108]: 587, delay = 0.74, delays = 0.1 / 0.02 / 0.43 / 0.19, dsn = 5.7.0, status = bounced (host smtp.gmail.com [64.233.186.108] said: 530 5.7.0 Must issue a STARTTLS command first. m103sm5763046qkh.20 - gsmtp (in reply to MAIL FROM command))

Do you know where I might be going wrong?

Best Regards,
Michael Voigt

#2

The target host requires authentification (username/ password) through TLS.

So you have to check the postfix (?) configuration.

See here: https://blog.bartlweb.net/2011/02/smtp-relay-host-mit-authentifizierung-in-postfix-konfigurieren/

and

https://help.univention.com/t/eine-empfangerdomain-uber-relay-mit-auth/8320/12

#3

Hey,
I found out here, the problem was tls_policy.db
I needed to run the postmap tls_policy
Now it works fine.

Best Regards,

Michael Voigt

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