Frank Ellermann writes:
Then let's add a note or example about it. In my wildest dreams about
"WSP-canonicalization" (for DKIM or similar) I never considered
"vanishing dot near column 73" <shudder />
Are you sure that it's not actually POP problem ? Bye
I've tracked it down to buggy SMTP handling. Quoted-printable encoding
inserts a soft linefeed, after character n. Character n+1 is a dot. As
far as SMTP is concerned, that dot now is on the start of a line and is
subject to stupid bugs.
(I personally once had it happen with a 73-character sentence. The last
dot was put on its own line, and for some recipients, that dot
terminated the message. Amazingly, the sendmail SMTP client didn't
dot-stuff by default. The unix vendor for which both I and the affected
recipients worked had neglected to change this in its sendmail.cf.)
Arnt