IMAP crashes with email that has no subject

[drjjr2]

The problem

IMAP crashes and stops working when an email is received that is just an image.

What version of Home Assistant Core has the issue?

2023.6.0

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

IMAP

Link to integration documentation on our website

https://www.home-assistant.io/integrations/imap/

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

There is nothing in home_assistant.log to indicate an issue.

Additional information

I have attached an email that causes the integration to crash
original_msg.zip

[home-assistant]

Hey there @jbouwh, mind taking a look at this issue as it has been labeled with an integration (imap) you are listed as a code owner for? Thanks!

Code owner commands

Code owners of imap can trigger bot actions by commenting:

• @home-assistant close Closes the issue.
• @home-assistant rename Awesome new title Renames the issue.
• @home-assistant reopen Reopen the issue.
• @home-assistant unassign imap Removes the current integration label and assignees on the issue, add the integration domain after the command.

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imap documentation
imap source
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[jbouwh]

Thanks for reporting, I'll have a closer look at this.

[jbouwh]

It seems to be the subject. The code is crashing because the header is not set.

[drjjr2]

It seems to be the subject. The code is crashing because the header is not set.

That makes sense. I fixed the error title. Thank you!