> Yes, and this is no less efficient, and in fact the configuration > is IMHO simpler, and mailq(1) output is more meaningful, ...
Thanks again. As it turned out, I was able to find a way to authenticate to my web hosting service's outbound SMTP server using a single username/password combo -- and thereby stop having to use sender-dependent authentication, and thus avoid the problems which accompanied the sending of my auth credentials to random servers, without needing to do anything complex. For the time being, I'm happy. :-) Thanks to everyone for their help. Rich Wales ri...@richw.org