In order to allow my Cyrus IMAP mail users to send mail from anywhere, I have configured sendmail so that any user that authenticates successfully using SMTP AUTH is allowed to relay email. Since both Cyrus IMAP and sendmail use SASL, my Cyrus IMAP mail users are able to authenticate.
Since most of my Cyrus users send their passwords in the clear, I have enabled START_TLS and SSL (using stunnel) in sendmail. Finally, I have sendmail listen on the standard MSA port rather than the standard MTA port for authenticated access.
FYI, Sendmail can do smtps w/o stunnel. Add -D_FFR_SMTP_SSL to your defines. When I coded this early on in 8.12, Claus made it an FFR, but it should be "standard" in 8.13.
-- Kenneth Murchison Oceana Matrix Ltd. Software Engineer 21 Princeton Place 716-662-8973 x26 Orchard Park, NY 14127 --PGP Public Key-- http://www.oceana.com/~ken/ksm.pgp
