l...@airstreamcomm.net wrote: > > To summarize, we think SMTP Auth is the simplest and most useful way to > allow people to send mail through our outbound mail system, and we are > hoping to get some feedback from the community regarding this perspective. >
Hi, I think it's a good idea. Additionally I suggest you enforce the traffic off port 25 and use the dedicated submission (586) for SMTP Auth and STARTTLS. Some older SMTP clients will not support STARTTLS properly. For them you can offer the same functionality on SMTPS (465) SSL/TLS. This way you'll have incomming SMTP traffic on port 25 and all outgoing on other, dedicated ports. Having separated them it is easier to implement different restrictions for incoming and outgoing traffic respectively. HTH, Mikael
