Why is the php documentation of mail() saying
Lines should not be larger than 70 characters.
(under the part: parameter message)?
Is there an RFC specifying the line length of mails?
This question: PHP mail and Lines should not be larger than 70 characters says
there are not that many clients left that cannot deal with long lines
So is it just bad build clients/servers that do bad stuff to too long lines, and 70 is a tested value that works well enough, or is there an RFC or something that says that mail-applications need to handle 70 char long lines?