Question

Neither imap_headerinfo nor imap_fetchstructure include the blatantly apparent Content-type header in the results [obviously, I’d expect this to be found under imap_headerinfo]. What function can I utilize to get the raw headers so I can parse that header and convert the message body to UTF-8 accordingly?

Answer 1

Of course after I resort to asking a question I figure it out eight minutes later.

The solution is to run imap_fetchmime across the message/part combo like so

$headers = imap_fetchmime($this->imapStream, $msgNumber, $partNumber);

This will contain a Content-type header, if available, for each part.