Dnia 18.09.2021 o godz. 08:39:41 Vladimir Mishonov pisze: > 2. While the above is mostly for aesthetical reasons, there is one > other thing: the templates for mailer-daemon messages have obsolete > "From" and "To" header formats, e.g.: > > >From: mailer-dae...@mydomain.com (Mail Delivery System) > >To: postmas...@mydomain.com (Postmaster) > > This appears to be the legacy RFC5322 header format (see > https://github.com/roundcube/roundcubemail/issues/5402). I'm not > very well versed in the RFC stuff, but what I can say for sure is > that so far I've ONLY seen this format in these templates, and > nowhere else. It looks like some email clients (like Roundcube, see > the link above) do not handle this format very well, probably for > the reason that it's barely used nowadays, if at all.
>From the very link you quoted, you can know that this format is still used and can be still seen in the regular emails you get, because (quote from your link): "at least two current programs use this syntax: The MUA called ELM, and the unix tool to send email from the command line (often used by cron jobs): mailx." Wouldn't it be better to patch Roundcube? Also from the link you quoted, the developers say they'll accept a patch. Someone even tried to submit a patch, but failed. It shouldn't be too hard to patch however. If I were you, I would rather try to patch Roundcube and not Postfix. > Postfix. I understand that I can make changes to the source code and > recompile the program, but even if I am able to accomplish this, it > would only be half of the job done, if not even less than that. I'd > also have to arrange a process to create packages in the appropriate > format for my OS distribution and keep them updated. You don't have to. You can get rid of packaged Postfix and use the one installed from source. Of course everytime new Postfix version is released, if you want to upgrade, you need to download the new source version, apply your patch and recompile. You can try to automate that :). But again, if I were you, I would rather go towards modifying Roundcube. It would be probably easier, and that's actually the place where the error is, so it should be fixed there, not worked around in Postfix, because you can get emails with headers in this forma from other sources too, as noted above. > The postconf(5) manual says > that postmaster notifications generated by smtp and smtpd _can_ be > inspected by adding "notify" to "internal_mail_filter_classes". > Unfortunately, while it does seem to enable DKIM signing for them > (via the milter application that I've configured), it still does not > apply any header checks to them. If you are able to apply a milter to them, you can write a milter that rewrites those headers. -- Regards, Jaroslaw Rafa r...@rafa.eu.org -- "In a million years, when kids go to school, they're gonna know: once there was a Hushpuppy, and she lived with her daddy in the Bathtub."
