I want specific non-fatal messages to precede others and interpret long sentences.

[rmast]

The newest version I found still can't cope with lines that have been split up by different rules of the max. linesize, like
The mail system

<xxxxxxxxxxxxxxxxxxxxxx>: maildir delivery failed: "Sorry, the user's
maildir
has overdrawn his diskspace quota"

so I'll come up with a new version. I'm trying to get this library to read IMAP-mails as well.
Probably the well maintained IMAP-implementation will lower the needed complexity for header and body interpretation.

At the moment I have an IMAP-user with some really bounced e-mails, for which I want all possible retries and mailbox full messages to appear before a 550 as a last resort appears. I even think about being more clear about not knowing, just answer 9.9.9 or something, as 550 already could be anything.

The resulting status can then be updated to the mail-relation records, to be able to decide to keep them. As I'm not confident I'll ever succeed at matching 100% I could imagine it would be convenient just to be able to click on some link with the mail-relation-record just to open the original e-mails without having to search for them.

[rmast]

I forked for these fixes. I didn't include IMAP-functionality to keep the testset in file-format.

Apart from the concatenation of broken lines, there also is a 'recurse'-function that doesn't recurse but just skip the line on which the recipient is found. This line sometimes contains the most crucial message however, so I chose not to skip it.