wp_mail does not correctly decode all MIME emails

[welcomb]

wp_mail does not properly handle and decode MIME emails, especially multipart content type other than multipart/alternative.

[foolswisdom]

Hi welcomb, thank you for the bug report!

Can you elaborate on how this problem manifests itself? What are the symptoms?

[welcomb]

Emails with content type other than multipart/alternative does not get parsed properly by wp-mail.php.

If you examine the code (line 43), it only handles "multipart/alternative" explictly, and never gets the boundary string properly.

Also, it assumes that the text/plain section is the first message section (line 109) but it might not necessary be true.

As such, with emails encoded in other multipart formats, e.g. multipart/mixed, wordpress will dump the undecoded content of the mail into the blog post.

I would suggest incorpration of a MIME decoding library to properly handle MIME decoding. What I did was write a quick hack for it.

[foolswisdom]

welcomb, can you test and see if you are experiencing this issue on trunk? phpmailer was integrated.

[welcomb]

I'm still getting my emails not decoded properly. Here's what displayed in the post:

--SE947567
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

Test test.
--SE947567

When it should have just extracted the text and shown "Test test."

[welcomb]

My fix to the problem

[foolswisdom]

Are you still seeing this problem? I know that there has been other tickets working in this area.

[darkdragon]

You can change the content-type by using a filter.