SMTP error "Server does not support sending internationalized header data"
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1. to develop
bug
skill:backend
- Dominant language
- JavaScript
- Stars
- 1k
- Forks
- 348
- Avg merge
- 12h 28m
- Merged PRs (30d)
- 91
Description
Steps to reproduce
- Have a server without the SMTPUTF8 (RFC 6531)
- Open the app
- Send a message to
chrístóph@domain.tld - Watch the outbox
Expected behavior
Message is sent
Actual behavior
\Horde_Smtp::send throws "Server does not support sending internationalized header data"
Mail app version
3.0
Mailserver or service
No response
Operating system
No response
PHP engine version
None
Web server
None
Database
None
Additional info
No response
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by tracing the mail-sending path into Horde_Smtp::send and reproduce the case with an SMTP server that lacks SMTPUTF8 support. Compare the handling of the internationalized recipient with the expected behavior, and verify that the message can be sent without the reported exception.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- php
- Domain
- backend
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100