Bug: mimeTree rebuilding does not join boundaries by a line break delimiter (e.g. `\r\n`)

[titanism]

Bug: mimeTree rebuilding does not join boundaries by a line break delimiter (e.g. `\r\n`)

[titanism]

@andris9 PR submitted to fix this at #572

[andris9]

Seems to be an issue with the parser 🤔

[andris9]

This specific parser bug triggers if the email does not end with a linebreak character. How did you get this email? Any email received via SMTP always ends with a linebreak?

[andris9]

In any case, I verified it, and it is a legitimate bug. It should be extremely rare in production, as emails always end with a linebreak unless you compose an email manually and use APPEND to upload it. I guess this is why it hasn't been discovered before - you need a multipart email with no-multipart text content and without an ending linebreak.

[andris9]

But the issue is not on the composing side, but on the parsing side. The composer behaves correctly.

[titanism]

Thank you @andris9, excited to try this out in the v1.41.1 release #573! 🎉 🙏 🙇