smtplib "authentication required" error

[carl.reimann at gmail.com]

Dear tjg: That was extremely helpful. Thank you very kindly. The server
did not respond to the .starttls() method but authentication was
successful after, it seems, the .ehlo() was specified. I have tried the
script without the first s.ehlo() and without s.starttls() and it works
perfectly. My authentication problems seem to have been that the server
uses EHLO, which must be specified! Thank you very kindly.