Also remember that message line length include the invisable as well as
visable lines prepended to the text of the messge e.g., RECEIVED
lines.  Things like attachments, MIME, styled (HTML) text, excess
quoting, and signatures all lengthen the message.

It is useful to search your archives and observe the length of useful
postings reported in the output in order to arrive at an approximate
upper line-length limit.

/Pete