sendmail and plus.net-authentication

f'up2comp.mail.sendmail

Hallo,

I try sending my emails via relay.plus.net as smart host, as BT
Broadband addresses seem to be on several 'global spam' lists.

The support couldn't give me further information on sendmail
configuration, but I assume they require some sort of authentication.

I tried adding the following to my sendmail.mc


define(`SMART_HOST', `esmtp:[relay.plus.net]')dnl
define('confAUTH_MECHANISMS', `PLAIN')
TRUST_AUTH_MECH(`PLAIN')
[...]
FEATURE(`authinfo', `hash -o /etc/mail/authinfo.db')dnl

And the following in the AuthInfo:

AuthInfo:relay.plus.net "U:xxx" "P:xxx" "M:xxx"
AuthInfo "U:xxx" "P:xxx" "M:xxx"

Looking at the traffic, I haven't seen any sort of exchange of password
or username, so I suspect sendmail to ignore the idea of authentication.

Any recommendations would be greatly appreciated!

Thank you very much!

Gunter