Re: DKIM length 'l=' tag
Matus UHLAR - fantomas <[email protected]>
| Newsgroups | gmane.mail.spam.spamassassin.general |
|---|---|
| Message-ID | <[email protected]> |
On 03.06.24 11:16, Marc wrote: > Hi Andrew, this is a bit of topic, I posted this a while ago on the mailing > list. But did you notice by any chance that eg. hotmail.com is failing > every dkim verification (except their sender rewritten messages)? I have checked yesterdays logs on one machine: Jun 4 08:57:50 proxy1 opendmarc[1815]: 4VthHc4zf1zMlJH: hotmail.com pass Jun 4 09:22:58 proxy1 opendmarc[1815]: 4Vthrc0mrNzMlFy: hotmail.com pass Jun 4 12:25:10 proxy1 opendmarc[1815]: 4Vtmts4GXGzMlM0: outlook.com fail Jun 4 12:32:17 proxy1 opendmarc[1815]: 4Vtn336J76zMl7T: hotmail.com pass Jun 4 12:36:04 proxy1 opendmarc[1815]: 4Vtn7R1B6pzMlCK: hotmail.com pass Jun 4 12:39:01 proxy1 opendmarc[1815]: 4VtnBr5mfRzMlB6: hotmail.com pass Jun 4 17:36:30 proxy1 opendmarc[1815]: 4Vtvp4063FzMlM4: hotmail.com pass Jun 4 21:24:20 proxy1 opendmarc[1815]: 4Vv0rz0TXJzMlLw: outlook.com pass Jun 4 21:30:55 proxy1 opendmarc[1815]: 4Vv10b0BFZzMlLv: outlook.com pass The failing 4Vtmts4GXGzMlM0 is DSN, which microsoft software (including on-premise exchange servers) seems not to dkim-sign. I guess that the From: header is added after DKIM signing. however we see no issues with hotmail DKIM signatures. -- Matus UHLAR - fantomas, [email protected] ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. Windows 2000: 640 MB ought to be enough for anybody