Sendmail 8.14.5/8.14.5 on fbsd-9.1R (EC2)

Matthew Seaman matthew at
Sat Apr 27 17:14:07 UTC 2013

On 27/04/2013 17:43, doug wrote:
>>> DAEMON_OPTIONS(`Port=587, Addr= 111.222.333.444, Name=MSA, M=E')

> If sendmail is listening on port 587, it will relay for any valid sender
> who can reach that port.

You see where it says 'M=E' in that DAEMON_OPTIONS line?  That should
probably be changed to 'M=Ea' meaning 'require authentication'.  That's
usually the right thing to do for a message submission agent, and the
use of authentication will allow senders to relay through the daemon
without the usual anti-relaying checks.



Dr Matthew J Seaman MA, D.Phil.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 268 bytes
Desc: OpenPGP digital signature
URL: <>

More information about the freebsd-questions mailing list