On Monday 11 October 2010 15:41:04 Allen wrote: > On Mon, 2010-10-11 at 02:57 -0400, Chris Knadle wrote: > > I've never tried to run multiple *different* MTAs at the same time -- > > that I can imagine being ugly and unpleasant, because there are > > differences in logging between MTAs among other things. And I can see > > several other problems with the idea -- the 'mailq' command would have > > contention for more than one MTA, so you'd have to install the 2nd MTA > > in a different path and specify the path to the executables in the init > > scripts as well as when you want to run commands... yeah, I can see > > that being ugly. > > > > -- Chris > > According to the Oreilly book "Essential System Administration" 3rd > edition (2002), Posfix and sendmail can coexist: > > =========================================================================== > ====================================== > > 9.4.2.1 Installing Postfix > > Installing Postfix is not difficult, but it does require some care. It > is possible to use both Postfix and sendmail on the same system, and the > procedures for doing so are discussed in the INSTALL file in the Postfix > source distribution. In this discussion, we will assume that Postfix is > replacing sendmail. > > =========================================================================== > ========================================= > > I did not read the referenced Postfix INSTALL file. > > (Personal note: I'm not trying to argue with the experts. Only after > reading in this thread that one of the thread participants used to > administer an email server, I thought it would be interesting to read > the chapter on email in "Essential System Administration").
No worries -- nobody is arguing here. I don't doubt it's possible to install multiple MTAs, however at least some systems (such as Debian and Ubuntu) have the reasonable expectation that only one MTA is going to be installed -- and as such the packages within the package tree for the different MTAs on those systems are designed to conflict with one-another. Each of the MTAs installs a "meta package" named 'mail- transport-agent', and also /conflicts/ with any other package that would also install 'mail-transport-agent'. So... yeah, you /can/ install more than one MTA at the same time, but you have to go through extra effort in order to do so, because you can't do this using the standard available packages. I suspect that the same is likely to be true for RHEL, Fedora, SuSE, etc. -- Chris -- Chris Knadle [email protected] _______________________________________________ Mid-Hudson Valley Linux Users Group http://mhvlug.org http://mhvlug.org/cgi-bin/mailman/listinfo/mhvlug Upcoming Meetings (6pm - 8pm) MHVLS Auditorium Nov 3 - Open Source Hardware: Bugs, Beagles and Beyond Dec 1 - IBM's Open Client Deployment Jan 5 - Building a Comunity Site with Drupal
