Op 1/31/2018 om 10:44 PM schreef Christian Authmann: > Hello, > On 31.01.2018 22:35, Stephan Bosch wrote: >> Op 1/31/2018 om 6:17 PM schreef Christian Authmann: >>> Hello, >>> >>> Sometimes, when delivering mails, this warning appears in my syslog: >>> >>>> lda(...): Warning: Failed to parse return-path header: Invalid >>> character in localpart >>> >>> dovecot-lda still exits with 0 and the mail is inserted into my inbox. >>> >>> >>> Looking at the mails in question, I determined that the error is >>> caused by a multiline Return-Path header. Here's a testcase: >>> >>> --- snip --- >>> Return-Path: >>> <nowh...@example.com> >>> From: "Nowhere" <nowh...@example.com> >>> To: redac...@example.com >>> Subject: Testcase for lda warnings >>> Date: Wed, 31 Jan 2018 12:00:00 +0000 >>> >>> This is a message body. >>> --- snap --- >>> >>> Copy into a file, with \r\n line endings, then run something like this: >>>> cat testcase.txt | /usr/lib/dovecot/dovecot-lda -e -d '<username>' >>> with a username recognized by your running dovecot installation. >>> >>> The header is 'Return-Path:', \r\n, two spaces, '<...>', \r\n >>> >>> According to rfc2822 folding rules, that should be valid - the >>> Return-Path header allows CFWS at that location. >>> >>> >>> The error message originates in lib-lda/mail-deliver.c in >>> mail_deliver_get_return_address(), while the invalid character message >>> seems to originate from one of several places in lib-lda/mail-deliver.c >> >> This is Dovecot v2.3.0 right? >> >> Regards, >> >> Stephan. > > yes, 2.3.0 (c8b89eb), archlinux, x64. Sorry for not mentioning it > earlier.
Whoops, yes, problem is obvious. Regards, Stephan.