The message could not be sent using SMTP {server} for an unknown reason - SMTP Authetication fails

Help! (Home for newbies)
1

Hi There,
I have recently moved the server on to a new installation of Virtualmin +CentOS 7 and I cannot longer send email using Thunderbird.
I have tried all possible settings however I still cannot figure out how to solve the problem.
When trying to send an email using Thunderbird:
First I receive an window asking to enter the password. If I enter the password it ask again and again …
If click to cancel and close the window then I get a error saying The message could not be sent using SMTP {server} for an unknown reason
These are last 2 lines in /var/log/maillog

Feb 10 01:59:49 [user] postfix/smtpd[1556]: warning: [ip+hosting connecting][IP connecting]: SASL PLAIN authentication failed: generic failure
Feb 10 01:59:50 [user] postfix/smtpd[1556]: warning: SASL authentication failure: cannot connect to saslauthd server: No such file or directory

Has anyone come across this before? any solution?

Thank you
Peter

2

Howdy,

It sounds like it’s not able to restart the saslauthd service. You may want to restart that, and see if that helps.

If you’d like a hand with how to do that, let us know what distro/version you are using.

-Eric

3

Thank you Eric,

That was it. For some reason saslauthd service stopped and I didn’t pick it up.

I restarted saslauthd service from Webmin / System / Bootup and Shutdown.

CentOS 7
Webmin 1.730
Virtualmin 4.14gpl