16 Mar
                
                    2017
                
            
            
                16 Mar
                
                '17
                
            
            
            
        
    
                9:04 a.m.
            
        Looks like this is a dovecot problem after all. :)
I can get Postfix to deliver to lmtp, but it's telling it to deliver to a fully qualified 'user@domain.tld' address. Postfix says that it can't find that user, and that turns out to be the case.
dovecot: auth: Debug: master in: USER#0112#011user@domain.tld#011service=lmtp
So I read up on that error, and it looked like I needed to do this in auth-system.conf.ext
userdb { driver = passwd override_fields = username_format=%n }
But that didn't work, same error.
So how do I convince dovecot that user@domain.tld is really local Unix account named "user" ??
Doug