Wow this takes me back. I haven't had to deal (much) with mail-agent comparisons for more than a decade.

I've worked with both for both Exim and Postfix, long ago and far away. Based on my memory: Exim is more monolithic and quite a lot easier to understand for an SMTP newcomer to admin while Postfix is faster, more modular, and takes a little more effort to install and maintain. GPL purists will also prefer Exim. Functionally and feature-wise they're nearly identical, and both appear to be actively maintained. HTH

On Sun, Dec 24, 2023 at 11:50 AM D. Hugh Redelmeier via talk <talk@gtalug.org> wrote:

| From: Giles Orr via talk <talk@gtalug.org>

| "exim4" is usually (not always) installed on Debian systems.

| From: Anthony de Boer via talk <talk@gtalug.org>

| Exim4 would be the right solution on whichever host you designate your
| mailserver.

| From: Michael Galea via talk <talk@gtalug.org>
|
| On my mail server (which runs an exim4 smarthost) my /etc/aliases resembles:

I used to use Sendmail but switched to Postfix some time this century.
Why do you choose Exim instead? Is it just that Exim is the default on
debian?

Postfix tries to be a Sendmail replacement, but better. That made the
transition easier.

Security-by-design has been a focus of Postfix. I seem to remember at
least one disastrous security problem with Exim.
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