> On 07/11 08:17 , ken wrote: >> I use qmail on fedora. I would like to be able to use a >> username/password >> to send mail and I cannot find where you would enter the password in >> backuppc, or if it is possible. Any ideas? > > AFAICT, you're misunderstanding how mail works on Unix. > > Backuppc calls some executable program (the Mail Transport Agent, or MTA) > and hands it a big chunk of text (your message). No authentication is > necessary for this step, since it's on the local box. > > The MTA then tries to deliver that message to the next machine in the SMTP > chain. This may be the destination machine (where the intended recipient's > mailbox is hosted). If that is the case, there's still no authentication > needed, since that's not part of communication between SMTP servers on the > Internet (this is why you can't easily stop spammers from bombarding you). > > On the other hand, if all the machines on your network go through another > mail server (a 'smarthost'); that machine *may* have SMTP Auth turned on. > In > that case, you'd need to configure your MTA (qmail in this case) to send > the > username/password combination to authenticate to that server so it can > send > mail. > > Usually tho, the smarthost is just set up to accept mail from the client's > IP address (since it's not likely to change, and if the machine is > compromised then the username & password are available to the attacker > anyway so it really doesn't do any good). > > Does this make things a bit more clear? > > Considering that qmail hasn't been updated since 1997 last I knew; it may > not be possible to set up SMTP Auth on it. (Unless someone wrote a patch). > SMTP Auth is really intended for roaming users who are trying to relay > mail > through your mailserver remotely. Not for machines on your local network. > > Without SMTP Auth; no password is needed to send mail. (Remember that this > was all designed back in the day when you could personally *know* all the > admins on the Internet; so they didn't think you needed authentication). > > -- > Carl Soderstrom > Systems Administrator > Real-Time Enterprises > www.real-time.com > > Carl - Thanks for the detailed explaination, so no SMTP Athentication - okay - I'll see what I can work out. Cheers! Ken
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