Ah joy of joys. One good, and bad, thing about Exchange 2007 is that you need to run a separate installation of an SMTP gateway. It’s good for security and also for lowering the load on the exchange server. It’s bad because that’s one extra point of failure, and it won’t work straight out of the box.<\/p>\n
Up until recently we’ve been running a custom installed MAIA\/Postfix\/ClamAV\/SpamAssassin server. The problem we’re encountering is the huge database files created by MAIA. Logging of every email is necessary, but we’re growing by 1GB every week. MySQL is a nice server, but even it has limits. One of those limits is when the server grows to the max of the HD – then all services stop. Never a fun time.<\/p>\n
So as a backup plan, we installed a standard Ubuntu server running a standard SMTP postfix configuration. Only issue with that is it doesn’t have the anti-SPAM\/greylisting (at least it has the AV installed). So instead of 99% of SPAM being blocked, it’s at 0%. Not fun.<\/p>\n
Since I’m not the best at Postfix configuration, I decided to go with a package deal: ESVA (Email Security Virtual Appliance). Yes, it’s a virtual machine. You need to run a VMWare server of sorts (or workstation) in order to use this software suite. Click here for the website<\/a>. So far it’s been a breeze to setup – it’s maintained by several people, has a forum board, and a few whitepapers on how to install\/administer. I’ll be fully testing it out on a maiden voyage soon, so look for an update.<\/p>\n ***UPDATE***<\/p>\n Here’s a few items that I learned during setup: As a final update: I’m getting roughly 500MB worth of mail every day (SPAM and regular). It doesn’t appear to actually delete the SPAM as I have stated per the rules, but I set the days to keep quarantine to be 7 days instead of 14. 7 days X 500MB = 3.5GB. Weekends receive a ton less mail, so we’d probably be fine with 14, but I just want to make sure.<\/p>\n","protected":false},"excerpt":{"rendered":" Ah joy of joys. One good, and bad, thing about Exchange 2007 is that you need to run a separate installation of an SMTP gateway. It’s good for security and also for lowering the load on the exchange server. It’s bad because that’s one extra point of failure, and it won’t work straight out of … Continue reading Anti-SPAM SMTP Gateway<\/span>
\nStop “SPAM Not Delivered” messages
\nEdit \/etc\/MailScanner\/MailScanner.conf and remove \"notify\" from the spam actions line.<\/code>
\nWebmin stops working after an update or during initial setup. You MUST open webmin using the admin panel interface link (under tools).
\nIf you want to edit the message body tags (the “scanned by ESVA” blah blah) go here:
\n\/etc\/MailScanner\/reports\/en<\/code>
\nAnd edit the files you see (txt and html).
\nTo keep \/var low, do the following:
\nTurn on the script in \/etc\/cron.daily\/clean.quarantine by changing the number 0 1<\/code>
\n$days_to_keep = 14; in \/etc\/cron.daily\/clean.quarantine<\/code>
\ndefine(QUARANTINE_DAYS_TO_KEEP, 14); in \/var\/www\/html\/conf.php<\/code>
\nINTERVAL 14 DAY in \/usr\/local\/bin\/mailwatch\/tools\/db_clean.php<\/code>
\nesva-update and esva-configure are your friends
\n\/etc\/hosts<\/code> is your friend too – You might need to add the IP of your mailserver and the name here<\/p>\n