Disabling Postfix, Raid services, inetd
Tony Arnold
tony.arnold at manchester.ac.uk
Mon May 30 09:31:08 UTC 2005
Tom,
On Sun, 2005-05-29 at 18:39 -0500, Tom Adelstein wrote:
> I imagine for people who don't know, you're using postfix but use it as
> a drop in replacement for sendmail? So, you're using the postfix to
> sendmail compatibility interface? For the sake of compatibility with
> applications that look for sendmail by default or whatever?
That is correct.
> I'm guessing, but your campus server requires authentication and that's
> not a problem because you're not blindly relaying. Correct?
That is also correct. It allows me to use the mail relay from of campus.
Our normal mail relays do not allow relaying of addresses from off
campus to addresses that are off campus. This is to avoid being
blacklisted!
> So, our server requires reverse DNS or it won't accept mail. Individuals
> without that who simply use localhost as their smtp would have a
> problem. To use postfix as you do, people would need what?
I think Mike Bird has answered this perfectly. I could do what I do
without postfix, but I would have to configure my authentication
credentials in every mail client I use.
Going via a mail relay means the destination server receives its mail
from the relay, which has a reverse DNS entry. If users do not go via a
relay, and try to send directly (either from an MTA such as postfix or
directly from a client such as evolution), then they had better make
sure their DNS entries are correct as Mike details. ISPs usually provide
a mail relay for this purpose.
Regards,
Tony.
--
Tony Arnold, IT Security Coordinator, University of Manchester,
Manchester Computing, Kilburn Building, Oxford Road, Manchester M13 9PL.
T: +44 (0)161 275 6093, F: +44 (0)870 136 1004, M: +44 (0)773 330 0039
E: tony.arnold at manchester.ac.uk, H: http://www.man.ac.uk/Tony.Arnold
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