Help! Cannot send mail anymore (Postfix) !
 

My config is such:
RECEIVE: ISP(POP3) -> PopFile -> Fetchmail -> Postfix (@sedentaire.local) -> BincIMAP -> Mail client.
SEND: Mail client -> Postfix (@sedentaire.local) -> ISP(SMTP).

Mail worked. It still works for receiving but not for sending. Nothing changed, except maybe if postfix was part of a recent "security and bugfix update". That's where I am...

I'm ready to try ANYTHING. If you find something peculiar or bad in my config, just say so. Please.

Postfix' config is:
It already happened once some time ago; it was my ISP not allowing mail relaying; they solved the issue at that time. However, that time, I had a report which said something like "please use your ISP's SMTP server". This time though, I have no report; a typical returned mail looks like this:
On the other hand, this works alright:
I got the mail!
So this time, I think it comes from me, my Postfix to be precise.

However, it worked before! Not knowing what to do, I looked at the output of "sendmail -q". Here it is:
An idea? I accept even seemingly stupid ideas; it may give me other ideas :)

Yves.

Your smtp service is refusing to start for some reason.

Change your master.cf to read..
run postfix reload, and look at a message going out.

Start of result: read next post...

End of result:Empty lines are those ending with "dict_eval: const " (nothing after). I had trouble with the 25kB limit.

Here is the now-current master.cf, minus comments:
Yves.

Check your /etc/services file.

It should have a line..

Yes, it does:I had already checked actually, but nonetheless, thanks for the suggestion. In fact, the above result makes me think: I may try and use smtps... maybe my ISP switched to smtsp for some reason; do you think this is possible?

Yves.

I don't know Mandriva, but I had the world's quickest look at their site. Looks like Mandriva may use SELinux. Do you have SELinux enabled?

If so, have a look at you system log (in FC5 /var/log/messages) and see if there are SELinux blocks. Try dissabling, and see if mail works.

billymayday, I thank you for having a look :)
But no, Mandriva does not use SELinux, at least not in the 2006-Download-Edition that I use.

Yves.

Reviewing all my config, I had an idea: try and see if local Postfix did work. And YES, it does!
I got both email! The second one is actually local due to the rule defined in "canonical-recipient": Knowing that local mail works, do you think I can assume that the problem comes from the ISP side?

Yves.

I don't run postfix chrooted, but have you tried running smtp un-chrooted (you should be able to just change the chroot setting int master.cf for the service)?

You need to add several files to the chroot directory..
/etc/services
/etc/resolv.conf
/etc/hosts
/etc/nsswitch

Please re-read the Postfix chroot setup docs!

Thank you both! A quick google search for "(chroot OR chrooted) postfix" directed me at the "/usr/sbin/postfix-chroot.sh" script.

The issue is now solved!

My chrooted environment was somehow half-set only! But "/usr/sbin/postfix-chroot.sh check" did not detect it because it works the bad way: it checks that files being there are OK. My files being there in the chrooted environment were OK, but most were absent and "check" did not report anything about those. I discovered that by reading the script.

So I ran "/usr/sbin/postfix-chroot.sh enable" and all is fine again, or so it seems.

I wonder what happened... It worked before... And I remember some (long) time ago having updated the chrooted "hosts" file, as I had updated the normal file too. The chrooted /etc disappeared somehow, though. postfix-chroot.sh cured it all. My mailq is empty now, at last.

Yves.