Hi All, Thanks for your suggestions, have got unlisted from rbl's as of now. I am using Cisco Iron-port as Mail Gateway so outgoing mails are scanned by Iron-port.
We have done some FBL sign-up also. Regards, Dhanraj Wadhe On Wed, Oct 5, 2011 at 11:28 AM, Ramprasad <r...@netcore.co.in> wrote: > On Tue, 2011-10-04 at 12:25 +0530, Dhanraj Wadhe wrote: > > Hi All, > > > > We are public email provider with postfix at backend. We are facing > > issue with getting black listed again and again. > > > > Blacklisted where ? by whom ? > > Usually If you get listed in any common blacklist you will get evidence > why you got listed. You should be able to trace the problem > > > Follow the general outgoing guidelines > > * Ratelimit the senders , monitor when people exceed "normal" rates > > * Do not allow any relay without authentication > > * Insist on using strong passwords > > * Sign up for FBL's and monitor the FBL's > > * If possible scan outgoing mails . ( Even a simple header check to > catch Nigerian 419ers helps a lot in my case ) > > * Enable smtp auth user logging so that you can trace the culprit in > case of an outbreak > > > > > > > > And all this has little to do with postfix :-) > > > >
