So, I'm helping out a buddy whose company recently signed up for the postini spam filtering service. Here's the twist, they run an offsite/co-lo (archaic) POP3 email server (imail 6).
So here's the deal. Postini tells me for the service to be effective, I need to lock down port 25 for only the postini range of IP's - Ok, no big deal - done. Here's where the problem comes in.
Because the mail server is offsite, the users at the office rely on hitting the server on port 25 to send mail, and of course at this point, they're blocked!!! And as far as I can tell on this old-arse email server, there seems to be no way to add an additional port for the server to listen on for smtp. One thought I had is to just come up with a random port number and have it redirect to 25 at the co-lo site, but then we'd have to get everyone to change their default smtp port, or go around do it for them (a lot of users).
Anything I'm not thinking of to make this headache go away? Thanks
So here's the deal. Postini tells me for the service to be effective, I need to lock down port 25 for only the postini range of IP's - Ok, no big deal - done. Here's where the problem comes in.
Because the mail server is offsite, the users at the office rely on hitting the server on port 25 to send mail, and of course at this point, they're blocked!!! And as far as I can tell on this old-arse email server, there seems to be no way to add an additional port for the server to listen on for smtp. One thought I had is to just come up with a random port number and have it redirect to 25 at the co-lo site, but then we'd have to get everyone to change their default smtp port, or go around do it for them (a lot of users).
Anything I'm not thinking of to make this headache go away? Thanks