Bug 409169 - Header lines can become too long
Summary: Header lines can become too long
Status: REPORTED
Alias: None
Product: kmail2
Classification: Applications
Component: general (show other bugs)
Version: 5.9.3
Platform: Debian unstable Linux
: NOR normal
Target Milestone: ---
Assignee: kdepim bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-06-25 10:32 UTC by houz
Modified: 2019-06-25 10:32 UTC (History)
1 user (show)

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Description houz 2019-06-25 10:32:02 UTC 
SUMMARY

When sending a mail to many recipients the 'To:' header can become longer than the allowed 998 bytes. KMail should fold it to span several lines so the mails don't get rejected by mail servers.

STEPS TO REPRODUCE
1. Create a new mail.
2. Add many recipients.
3. Send it to someone using (for example) exim.
4. Look at the reject log on the mail server.

OBSERVED RESULT

Mail gets rejected due to header not valid according to RFC 5322.

EXPECTED RESULT

Mail gets delivered because it is not malformed.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: (whatever Debian/sid ships)
(available in About System)
KDE Plasma Version: (whatever Debian/sid ships)
KDE Frameworks Version: 5.54.0
Qt Version: 5.11.3

ADDITIONAL INFORMATION

[0] RFC 5322: https://tools.ietf.org/html/rfc5322#section-2.1.1