Dear Imail UG Gurus,
We are fairly new to Imail. Installed 5.08 a few months back for multiple
domains and recently upgraded to 6.02. We heavily use Web Mail for these
domains. All has been well so far! However, I am very concerned about SMTP
abuse and VIRUS attacks, and want to be proactive. We are behind a firewall,
however not really tweaked any specific settings regarding our e-mail ports,
etc. Any feedback from the IMail gurus is most appreciated.
1) Is there anyone or entity whereas we could obtain a list of known "IP
addresses" who have a history of scanning and finding e-mail server SMTP
addresses, and then using them for SPAM without permission?
2) In relation to the above question - what is the best way to configure
IMail to defend against unauthorized users of the SMTP service? I read that
enabling reverse authorization DNS look-up is one way, however does this not
significantly reduce performance?
3) What is the best way to defend against Virus attacks attached to e-mails?
We run Network Associates NT Sheild on our server, which supposedly does
scan everything coming into the server. However, I am not so sure how well
it does with e-mails?
Best Regards,
Don Schreiner
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