We are currently supporting sending and receiving SMSes
and FAXes by SAP servers only via RFC channel. I think
it might be valuable in some cases to implement also
SMTP channels as is described in SAP Note 455140 -
"Configuration E-mail, fax, paging/SMS via SMTP"
and also here:
http://help.sap.com/saphelp_nw04/helpdata/en/c7/92e93ac678601be10000000a11402f/frameset.htm
I suppose it might be the solution for bug (is it a
bug?) in some of SAP R/3 servers that I have described
here:
https://www.sdn.sap.com/irj/sdn/thread?forumID=39&threadID=230073
From SAP R/3 server point of view it is only
configuration matter. From Communications Suite point
of view we must implement (embed ?) SMTP server --
maybe Apache JAMES Project would be good candidate for
that ( http://james.apache.org ) ? SMTP protocol would
be the second option for receiving messages from SAP
from CS point of view (it could be working parallel to
RFC channel established with other SAP servers). It
should be also possible that we support RFC and SMTP
channels for the same SAP server.