Re: Issue with getting listed in spam again and again.
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 :-)
Re: Issue with getting listed in spam again and again.
Am 04.10.2011 08:55, schrieb Dhanraj Wadhe: Hi All, We are public email provider with postfix at backend. We are facing issue with getting black listed again and again. Currently we have setup reverse lookup, DKIIM and SPF to avoid getting listed into rbl's and dnsbl. that has no relationship, different rbls have different workouts for adding ips dkim and spf are mostly not related to that read the faqs by rbls that most tagged you, try to avoid what they tag general, scan your outgoing mail against spam Regards, Dhanraj Wadhe -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria
Re: Issue with getting listed in spam again and again.
Zitat von Dhanraj Wadhe dhanraj.wa...@gmail.com: Hi All, We are public email provider with postfix at backend. We are facing issue with getting black listed again and again. Currently we have setup reverse lookup, DKIIM and SPF to avoid getting listed into rbl's and dnsbl. In most cases the issue arises because your servers are used to send spam. Fix this and you will not get blacklisted by any reasonable RBLs. If you don't fix it you will get listed again and again because this is how RBLs are supposed to work. Regards Andreas smime.p7s Description: S/MIME Cryptographic Signature
Re: Issue with getting listed in spam again and again.
On 2011-10-04 2:55 AM, Dhanraj Wadhe dhanraj.wa...@gmail.com wrote: We are public email provider with postfix at backend. We are facing issue with getting black listed again and again. Evidence? Currently we have setup reverse lookup, DKIIM and SPF to avoid getting listed into rbl's and dnsbl. Per the welcome message you received when you joined the list: TO REPORT A PROBLEM see: http://www.postfix.org/DEBUG_README.html#mail This usually means postfix version, output of postconf -n and unedited NON-verbose (unless verbose are specifically requested by someone helping you) logs exhibiting the problem. Other details, like contents of master.cf, and maybe even platform/OS details may be necessary for certain issues. Bottom line - without some kind of details on why or how you are getting blacklisted, your comment/complaint is just blowing in the wind. -- Best regards, Charles
Re: Issue with getting listed in spam again and again.
Dhanraj Wadhe: Hi All, We are public email provider with postfix at backend. We are facing issue with getting black listed again and again. There are many reasons why this can happen: - Users forward all their email, and therefore they also forward spam. - Users are phished and spammers use their login to send spam. - User machines are infected with spambots. - Users have bad passwords and spammers can guess them. - Spammers sign up by breaking your webmail captchas. Currently we have setup reverse lookup, DKIIM and SPF to avoid getting listed into rbl's and dnsbl. To avoid being listed, don't send out spam. Wietse
Re: Issue with getting listed in spam again and again.
On Tue, Oct 4, 2011 at 2:55 AM, Dhanraj Wadhe dhanraj.wa...@gmail.com wrote: We are public email provider with postfix at backend. We are facing issue with getting black listed again and again. Currently we have setup reverse lookup, DKIIM and SPF to avoid getting listed into rbl's and dnsbl. Great. Once your mailstream is being signed, you can start signing up to different FBLs ( http://blog.wordtothewise.com/isp-information/ ) and be able to audit some of the kinds of messages that users on the remote networks are marking as spam.
Re: Issue with getting listed in spam again and again.
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 :-)
