I installed qsmtpd last weekend to give it a try. I opted to install it on a different machine and used the queue/smtp-forward plugin to get it into the 'production' machine.
I changed the MX records of some domain names which receive a lot of spam to the machine running qsmtpd. My question: What happens when 'queue/smtp-forward' wants to forward the email and the 'production' machine is temporarily (lets say 2 hours) unavailable. ? Does queue/smtpd-forward implement some kind of waiting queue in this scenario? Or will the mail be lost? I am very impressed with qsmtpd. It is currently blocking about 99% of our prior spam. Almost entirely using the early-talker en dnsbl (spamhaus). It's by far the easiest to implement smtp server with spam blocking at smtp level. Regards, David
