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This started out as a sendmail problem, but now I'm finding that
I cannot connect to localhost. 'telnet localhost' says 'connection
Refused'. Sendmail does it too. There were no entries at all in
/etc/hosts.allow or /etc/hosts.deny. I added 127.0.0.1 to hosts.allow.
The documentation at the top of the file says it's for tcpd, but
tcpd does not show up in '/sbin/service --status-all'. Nor does tcpd
show up when I do 'ps -ax|grep tcpd'. Also nothing about it in
How does tcpd normally get started, and is this even my problem?
I can now send mail between users. The problem was the DAEMON_OPTIONS
setting in /etc/mail/sendmail.mc:
dnl # The following causes sendmail to only listen on the IPv4 loopback address
dnl # 127.0.0.1 and not on any other network devices. Remove the loopback
dnl # address restriction to accept email from the internet or intranet.
dnl # DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl
Note how the entry with 127.0.0.1 address is commented out. I, misunderstanding the docmentation, had replaced 127.0.0.1 with my local ip addr. I didn't understand that the address must be removed entirely from the entry.
That's why I are called a newbie.
Thanks for your help pimpster. Although I did, in the final analysis, figure it out for myself, it really helps to have a little guidance along the way.