Hey Alex,
ich habe sendmail config an der Console mal ausprobiert, und es hat auch geklappt, d.h. es kam bei eingabe von ">3,0 thomas.moeschel@sonnet.de" eine Ausgabe ähnlich wie bei meinem lokalen Account.
Was meinst du mit "mail.sonnet.de" als "forwarder"?
Meine "/etc/rc.config.d/sendmail.rc.config" sieht folgendermaßen aus:
#
# smarthost - this host gets all outgoing email from us
# normally used for uucp-connected sites or for dialup connections
# use "uucp-dom:server.uucp.com" to deliver all email to "server.uucp.com"
#
SENDMAIL_SMARTHOST="smtp:mail.sonnet.de"
#
# sendmail assumes the following space-separated host-names to be
# the local host (this must just be used for names differrent to the
# hostname, for e.g. aliases like www.nowhere.com)
#
SENDMAIL_LOCALHOST="localhost proxy.moeschel.de"
#
# do not deliver any email locally, but send all email to another host
# this can just be used with another system that has the same users on it
# and you probably also want to set the FROM_HEADER to the other host
#
SENDMAIL_RELAY=""
#
# with what parameters should sendmail be started?
# normal sites use "-bd -q30m -om". if you set SENDMAIL_EXPENSIVE and you
# have a dialup ISDN connection, you probably want to set this to
# "-bd -om" and run "sendmail -q" from your crontab.
#
SENDMAIL_ARGS="-bd -q05m -om"
#
# sendmail will only queue email in /var/spool/mqueue and will only start
# to deliver it if "sendmail -q" is run
#
SENDMAIL_EXPENSIVE="yes"
#
# sendmail will not try to canonify hostnames in your email
# so much less DNS-queries are send
# you probably want to enable this on a SENDMAIL_EXPENSIVE system.
# Don't forget to add the local, the mail hub, smart, and mail relay host
# with their IP addresses and the corresponding Full Qualified Domain Names
# to /etc/hosts
#
SENDMAIL_NOCANONIFY="yes"
#
# this option forbids DNS-queries. It requires a well configured
# /etc/hosts as described for SENDMAIL_NOCANONIFY. For most
# people using dial on demand SENDMAIL_NOCANONIFY should work.
#
SENDMAIL_NODNS="no"
#
# let sendmail deliver local mails in defer (postpone) mode.
# This also sets some entries to avoid dialups. A correct
# FQHOSTNAME for the local host is required.
#
SENDMAIL_DIALUP="no"
#
# these domains can additional to the local domains be changed
# in /etc/mail/genericstable
#
SENDMAIL_GENERICS_DOMAIN="proxy.moeschel.de"
#
# From:-Line in email and News postings
#
FROM_HEADER=""
#
# generate sendmail.cf from parameters in rc.config
#
SENDMAIL_TYPE="yes"
Gruß Mr.Tom