Out of curiosity and just to be precise, are you talking about
the header field name or the field value?
I was originally talking about the header field name, but I think the
field value could use some addressing. I once saw a spam email in my
inbox which 95 percent of the actual email was an extremely long
I don't understand the problem. Spammers will send all sorts of junk
which we need to defend against no matter what since they will ignore
Each line is limited to 998 octets plus CR-LF, but headers can be
arbitrarily long and folded at spaces. These limits date back to RFC
780 forty years ago so it seems kind of late to try to change them now.
ietf-smtp mailing list