Problem with attachment name in message/rfc822

[mary-pe]

Hi,
I have a problem with the attached message.
The name of the attached pdf is split into two lines inside the header and RC 1.5.0 is not able to decode the real name, showing "Part 1.2.pdf".
Thanks

attachment_problem.eml.txt

[alecpl]

The sample is malformed. I'd also suggest update to 1.5.2.

[mary-pe]

Thanks for the reply.
I downloaded the RC 1.5.2 and the problem still exists.
Furthermore why do you consider the sample malformed?
I parsed the message with Perl MIME::Parser and it didn't find any errors.
Thunderbird also opens the sample without errors.
Thanks!

[alecpl]

It's a message inside a message where the structure is malformed. It does not import into Roundcube. But anyway, if I fix the structure, I see no problem with attachment name. I suspect an IMAP server bug. Enable imap_debug option and check the BODYSTRUCTURE response from the server.

[mary-pe]

I opened this sample with the same imap Server but using both RC 1.3.9 and RC 1.5.2, and only RC 1.5.2 shows the problem.
I'm using PHP 7.3
How do you suggest to proceed?
Could you please give me the fix you applied to the message?
Thanks

[alecpl]

Enable imap_debug and provide the log from the moment you open the message.

[mary-pe]

imap_debug_rc.log

[alecpl]

Hmmm... this part looks pretty match the same here. How about the response to FETCH for the attachment part headers?

[mary-pe]

imap_debug.log

[alecpl]

Ok, this at least helped me to reproduce the issue. I'll investigate.

[mary-pe]

Ok, thank you.

[alecpl]

Fixed.