I have some clients who want to use my SMTP for sending emails, so I enabled the POP before SMTP, with 5 min relay window opened. Unfortunately, the are POP logins almost every minute, so I have the relay opened continually, all the time. Is there any other way to offer restricted access to SMTP for my clients, without having the risk of an opened relay?

Pop Before SMTP opens it up on a per-ip basis. So your troubles are already solved.

Originally posted by Franki
I have some clients who want to use my SMTP for sending emails, so I enabled the POP before SMTP, with 5 min relay window opened. Unfortunately, the are POP logins almost every minute, so I have the relay opened continually, all the time. Is there any other way to offer restricted access to SMTP for my clients, without having the risk of an opened relay?

You mean pop3 authentication, right?
It only allows relay -temporarily- for the IP that just connected to the POP process, so I don't know what your problem is..?

Originally posted by CmptrWz
Pop Before SMTP opens it up on a per-ip basis. So your troubles are already solved.

Woops sorry I didn't see your post. But I agree :D

I have many clients shared 2 IP's. When I have POP login, relay is opened for both IP's, I have checked it. The IP's are in the same machine. What's wrong?

Ok guys, I think I found out what's happening. Thanx.