Other Mail Systems
There are a number of other mail systems around. A few comments on
the main competion:
- sendmail: the de-facto standard; a seemingly
infinite source of security problems; on the up side, sendmail is now
being actively developed again and version 8.6.x (where x >= 9) is
getting good press. sendmail behaves very well under high (to huge)
loads and is robust. On the down side, sendmail is a bitch to configure
as it's configure syntax is arcane in the extreme. You can configure
sendmail to do just about anything to the mail headers. You can
configure sendmail to do just about anything wrong to the
headers.... Best for big sites with good sysadmin; a pain for
novice users. Don't even think about using sendmail without a copy of
the O'Reilly book.
- PP (Postman Pat): takes a lot of inspiration from MMDF.
Huge and somewhat complex to configure, but a lot easier to control
and monitor than some of the competition. The only one that supports
X.400 and ISO comms, which means you need the full ISODE kit as well.
A bit of a performance pig under high loads.
- smail: version 3 is small, easy to configure and
install. Ideal for small sites. Much better than sendmail in this
regard. For standard setups, needs almost no configuration. Not
suitable for high loads or as a primary gateway. A possibility for
all the other machines in maths other than the main gateway.
- There are others, but I know little about them.