I would definately give the edge to Postfix then.
I use sendmail everywhere myself, but for my main servers I have to roll my own RPMs anyway to get additional things turned on (also I use the same source RPM on Linux, Tru64, and Solaris). Having sendmail removed wouldn't bother me.
I dunno if the suggestion is actually to remove it (move it to Extras) rather than just make Postfix the default MTA.
The biggest question is still the upgrade issue; if sendmail is removed from Core, what will happen on upgrades? Users will be left with the old version of sendmail running.
See above for one thought. OTOH if it were removed Postfix would just obselete sendmail and well... you'd have to reconfigure :)
What would be "nice" would be a hack in anaconda to check for a default config sendmail install (i.e. nothing has been changed since install) and replace it with the new default MTA (postfix or exim). If anything has changed, just leave it alone. There currently isn't really a way to handle changing the default provider of a service from one package to another.
Well one way to look at it is, rpm lets you remove a package but leave the config files behind anyways, automatically converting between 2 very different MTA's isn't feasible at this juncture (unless tools exist?) since they have different features and vastly different config parameters.
Good thoughts though Chris, you made some good points I forgot about :)
-sb
