Installing outbound SMTP server on CentOS
Kevin_Miller at ci.juneau.ak.us
Sat Jul 2 00:23:17 IST 2011
I'm setting up an outbound server so I have a single egress point from our internal network. I'll be running MailScanner on it primarily so that I can set the watermarking feature to help control joe-job blowback. I have three existing inbound gateways that aren't currently using watermarking. I thought I'd post here for a quick reality check before shooting myself in the foot.
My plan is is to assign all four hosts (one outbound, and three inbound) the same watermark per the comments in MailScanner.conf, but leave the line
"Treat Invalid Watermarks With No Sender as Spam nothing"
set to nothing initially so that I can do a bit of testing and watching before going live.
The current settings are:
Use Watermarking no
Add Watermark yes
Check Watermarks With No Sender yes
Treat Invalid Watermarks With No Sender as Spam nothing
Check Watermarks To Skip Spam Checks yes
Watermark Secret <some secret string>
Watermark Lifetime 604800
Watermark Header X-CBJ-MailScanner-Watermark:
When I send a message via one of the gateways I'm not seeing the X-CBJ-MailScanner-Watermark:. Do I need to set "Use Watermrking" to yes first? I would think, given the settings, that the watermark header would be added but ignored. If I go ahead and turn on watermarking but leave the invalid watermark line set to "nothing" will that turn everything on but not actually affect the outcome of the process? (Sort of like the "~all" parameter in SPF.)
Kevin Miller Registered Linux User No: 307357
CBJ MIS Dept. Network Systems Admin., Mail Admin.
155 South Seward Street ph: (907) 586-0242
Juneau, Alaska 99801 fax: (907 586-4500
More information about the MailScanner