wp_mail() From: is broken if "From: email" in headers

[donncha]

When using wp_mail() if you pass a header with the text "From: me@…" instead of "From: me <me@…>" the generated "From:" line in the email is incorrect.

It will look like "From: me@… <>" which may confuse some brain dead mail user agents.

Fixing it is easy. Change line 294 of wp-includes/pluggable.php from

$from_name = trim( $content );

to

$from_email = trim( $content );

[ryan]

(In [10541]) If no angle brackets, assume email address. Props donncha. fixes #9086 for trunk