Ask HN: Please recommend an open-source SMTP server

[eserorg]

We are looking at running an internal SMTP server capable of handling ~40,000 emails per day.

We need to be able to query the server for detailed reports on hard/soft bounces, blocks, spam reports, etc...

We are playing around with implementing our own solution in Perl.

However, I wanted to query for existing solutions before we plowed ahead.

We have been using one of the existing 3rd party mail-delivery solutions. However, our subscriber base is getting to the point where it may be worthwhile to setup our own dedicated server (and IP addres) in our own colo facility.

Thanks!

[gjvc]

http://www.postfix.org

[agazso]

I second that. It is mature technology, can be easily integrated with spam and virus filters and its configuration is quite logical.

It should handle 40000 emails a day on an old machine easily (it is about twice a second on average).