I’m looking forward to seeing other answers to this question, but my feeling is that if you’re catching compromised mail accounts after only 40 spams have got through, you’re doing really well. I’m not sure I could detect similar abuse so quickly, and the prospect worries me. But I’m appalled that seven sets of credentials … Read more
You may take a look at ASSP. Works great so far.
Do yourself a favor and set them up with a gateway anti-spam service such as Postini. For a few dollars per mailbox per month, there’s absolutely no reason not to and you’ll not only eliminate 99% of your spam, you’ll also enjoy having access to their spool service (handy for scheduled or unscheduled downtime), not … Read more
I think you’re misunderstanding the way Linux reports memory usage. When a process forks, it results in a second process that shares a lot of resources with the original process. Included in that is memory. However, Linux uses a technique known as Copy On Write (COW) for this. What that means is that each forked … Read more
It seems to me that what your question boils down to is “how many mail servers out there check SPF records on incoming email?“. If it’s most of them, SRS is an absolute requirement for a forwarding server; if it’s none of them, you don’t need SRS. Unfortunately, I can’t immediately put my hands on … Read more
There is both specific and general advice that may be useful in this case. Specific The underlying problem here is that Garuda Airlines, bless their little cotton socks, are sending confirmation emails that bear many of the hallmarks of spam. The subject line is VERY SHOUTY, they send HTML-only emails which contain quite lot of … Read more