SMTP server login fails - passwd-file

[starter]

I am no longer able to send emails with my server, there is an issue with Dovecot's login.

/var/log/dovecot.log:

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auth: Error: passwd-file(copier,123.456.123.456): stat(/etc/exim4/domains//passwd) failed: No such file or directory

As you can see a directory name is missing in the path.
In the Dovecot configuration this missing string seems to be the %d variable.

/etc/dovecot/conf.d/auth-passwdfile.conf.ext:

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passdb {
  driver = passwd-file
  args = scheme=MD5-CRYPT username_format=%n /etc/exim4/domains/%d/passwd
}

userdb {
  driver = passwd-file
  args = username_format=%n /etc/exim4/domains/%d/passwd
}

Any idea ? I tried to rebuild the user, but that did not fix the issue.

[Francis]

I'm going to respond to this because I ran into the same issue after a recent Dovecot upgrade. If you choose to rebuild the certificate, the file permissions need touched. The following command fixed this issue for me.

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chmod 640 /usr/local/vesta/ssl/*