Timeline for How do I block an email address in Postfix?
Current License: CC BY-SA 3.0
12 events
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| Feb 11, 2022 at 21:42 | comment | added | mwm | And so, is there any solution to block the From rules? | |
| May 5, 2016 at 18:32 | comment | added | user7835 |
@billynoah how correct you are. took me several hours to figure this out. Put simply, smtpd_sender_restrictions will only block mail based on its Return-Path header NOT its From header. So if your smtpd_sender_restrictions hash:/etc/postfix/block contains [email protected] REJECT mail with From: [email protected] will NOT be rejected; rather, only mail with Return-Path: [email protected] will be blocked (!!) Arrrrgh.
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| Mar 4, 2015 at 17:43 | comment | added | Eaten by a Grue |
In my experience the smtpd_sender_restrictions only affects mail based on return path, not MAIL FROM header as it says in the docs. Not sure if this is a bug or what. I tried spoofing an email to my server that should have been rejected by setting from in the header and it had no effect. When i added the -f flag to sendmail to specify return path it successfully rejected my email.
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| Oct 21, 2014 at 21:31 | answer | added | Alexis Wilke | timeline score: 4 | |
| Aug 28, 2013 at 6:49 | answer | added | Laurentiu Roescu | timeline score: 3 | |
| Aug 27, 2013 at 17:56 | history | edited | Pablo Fernandez | CC BY-SA 3.0 |
added 353 characters in body
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| Aug 27, 2013 at 15:57 | comment | added | Pablo Fernandez | @DanilaLadner yes. | |
| Aug 27, 2013 at 15:51 | comment | added | Danila Ladner | Right, so that external email is sending you emails you want to block for your users? | |
| Aug 27, 2013 at 15:42 | comment | added | Pablo Fernandez | @DanilaLadner it's an external email address, a sender that is not me. | |
| Aug 27, 2013 at 15:42 | history | edited | Pablo Fernandez | CC BY-SA 3.0 |
added 66 characters in body
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| Aug 27, 2013 at 15:39 | comment | added | Danila Ladner | you need to block the address you are trying to send to or receive from? Sorry, a little bit not clear. | |
| Aug 27, 2013 at 15:35 | history | asked | Pablo Fernandez | CC BY-SA 3.0 |