getmsg.cgi used a "\n^From " pattern to find the end of
one email message and the start of another. this hueristic
failed on lines like "\n^From Ushant to Scilly is 35
leagues".

the new pattern relies upon our From line ending in the
four digits of the year. which is also an hueristic that
will from fail from time to time. For example "\n^From
2000 substract 1 to get 1999$".

PR: docs/21762