smtp: smtp transaction not logged if no email is present
The SMTP logger will not write out the transaction log if the email portion fails to log, however the other SMTP data may still be valuable. This is what happens when an SMTP transaction is upgraded to TLS with STARTTLS. The SMTP logger runs, but no record is created.
Updated by Peter Manev about 1 year ago
Originally reported on the SELKS project https://github.com/StamusNetworks/SELKS/issues/346