Thank you for the report.

Is this a new problem, or could it always have existed without being discovered?
'vacation' [Automatic mail answering program for Linux] has almost never been updated, at least not for years.
Where do the strange mail headers come from? Are they recent, or have they always been like that? I agree about the possibility of the linebreak being the problem. Are you able to test this idea by frigging:
From: "ABC"
	<de.fg@ab.de>
to
From: "ABC" <de.fg@ab.de>

It seems our version of this program is the latest...

CC: (none) => lewyssmith

There are two old, but still open, bug reports upstream, about the From: address not being handled correctly. 

https://sourceforge.net/p/vacation/bugs/

Isn't this just another one?

CC: (none) => marja11

I guess so....
I don't know if there is a more accurate variant to handle out-of-office messages, or if the sf source is outdated.

But it is not nice if the reciepient does not get an answer just because of that.

Will u report it upstream, should I?

(In reply to Marc Krämer from comment #4)
> Will u report it upstream, should I?

Do you mind doing it?

I hope it'll help. Since August 2010 they haven't fixed any issue reported there :-(

looks like the beta version fixes the bug:
https://sourceforge.net/projects/vacation/files/vacation/1.2.8.0-beta1/

I'll test the beta, report, and make the update, if possible

That would be great. It is effectively a bug known upstream, and the project is moribund: the update you found is from 2014....
If the update does not fix the problem, this should go in ERRATA, and we might consider dropping it.

Thanks to both Marja & Marc for juggling this.

@Lewis: even if it does not work well, it is better than nothing, as we don't have an alternative. I did not have the time yet, to test that update, but the comments suggest, it is fixing it.

Updated vacation package:

This updates fixes issues with mail headers containing line breaks.

========================

Updated packages in core/updates_testing:
========================
vacation-debugsource-1.2.8.0-1.beta1.1.mga9
vacation-debuginfo-1.2.8.0-1.beta1.1.mga9
vacation-1.2.8.0-1.beta1.1.mga9

SRPM:
vacation-1.2.8.0-1.beta1.1.mga9.src.rpm

Assignee: bugsquad => qa-bugs

Advisory from comment 9 added to SVN. Please remove the "advisory" keyword if it needs to be changed. It also helps when obsolete advisories are tagged as "obsolete"

Keywords: (none) => advisory

Thanks again to Marc for the update, and Marja for the Advisory.

CC: lewyssmith => (none)

MGA9-64 Xfce on Acer Asppire 5253
No installation issues.
No previous updates, no wiki, started googling, but couldn't make any sense  of it. Leaving for someone else. At least I cann't see anything disturbed by it.

CC: (none) => herman.viaene

I tested vacation - it works as best I can tell.  Was able to issue the commands and it seemed to happily do the functions.

Whiteboard: (none) => MGA9-64-OK
CC: (none) => brtians1

Sounds like the best we are going to do. Thanks.

Validating.

Keywords: (none) => validated_update
CC: (none) => andrewsfarm, sysadmin-bugs

An update for this issue has been pushed to the Mageia Updates repository.

https://advisories.mageia.org/MGAA-2023-0138.html

Resolution: (none) => FIXED
Status: NEW => RESOLVED