Comment 6 for bug 148362

It would be nice to manually select the smtp server when sending a mail, or be
able to define a "filter" so that mail going to mail servers using blacklist can
use my isp mail server and the rest use my local smtp server (that is
blacklisted, because I use a dial up internet connection).

Take into account that when sending to servers that use blacklist, the mail is
sent without any problem, but returned afterwards. I would like to specify a
different smtp server for this servers/address.