Could someone explain why one might want to use qmail (or this, its newest incarnation) over postfix or opensmtpd? Would I gain anything by shifting to qmail or opensmtpd?
Could someone explain why one might want to use qmail (or this, its newest incarnation) over postfix or opensmtpd? Would I gain anything by shifting to qmail or opensmtpd?
As far as opensmtpd is concerned, it is production ready and has been used in high volume environments sending mails to millions of recipients daily, handling multi-million queues.
The project was started in 2008 so when it comes to being run in production environments, I think we can claim that it's ready :-)
Now as for the what you would gain, I won't do proselytism, we have published a couple presentations on our website which describe how it works and some of the technical details behind it. You will also find lots of technical details on my blog where I post mostly about OpenSMTPD internals.
If you have a running Postfix, I suggest you don't shift but keep your working setup. If you intend to setup a new MX, you should definitely give a try and see how it goes for you.