mail-transport-agent (Re: Bug#504880: Disambiguate "installed" for packages)

[Jonathan Nieder <jrnieder@gmail.com>]

(-cc: the bug.  Sorry about that tangent.)

Bill Allombert wrote:

> Another issue is that only one MTA can be listening on port 25 at any time, and Debian
> does not provide a way to prevent two packages to be configured to listen on the same
> port.

That is a good point, and one that I do not think could not be solved
with triggers.  So packages that require an MTA (like fcron) really
need to stop while switching MTAs, or they can find themselves
without a sendmail to talk to (and, in the case of fcron, lose
output from jobs).

Thanks.  Will think more.