sendmail on FreeBSD


 
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Operating Systems BSD sendmail on FreeBSD
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Old 01-24-2006
sendmail on FreeBSD

Dear all,

I have been using freebsd 5.4 for 2 months using fetchmail to retrieve mails and using sendmail to send mails.
I have no problem with fetchmail to retrieve mails from pop3 server.
And most of the time I have no problem with sendmail.
But recently I found that I could not send mails to freebsd-stable@freebsd.org.
Actually sendmail is a mail server (not a client), which sends mails directly from my host to other mail servers without relaying and SMTP is a server-to-server protocol, which requires reverse DNS to gain full functionality.
Correct me, if I'm wrong.
I found that rDNS was not supported to the given IP address and PTR record was not found (I don't know so much about them).
So my sendmail can not work with some destination servers.
How to config rDNS? Shall I call ISP?
Does relay help me solve this problem? And how to config it?

More info: I'm on dual stack; dynamic IPv4 and static IPv6 (6bone).
Somebody who experienced this problem please point me out.

Thanks in advance,
Jaguar
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INCM(1) 						      General Commands Manual							   INCM(1)

NAME
incm - Incorporating new mails for Mew SYNOPSIS
incm [options] DESCRIPTION
The incm utility incorporates new mails from the mbox or the maildir to Mew's inbox folder. The options are as follows: -a Retrieve all mails from maildir/{cur,new} for maildir. -b Backup mails. mbox: No truncate mbox file. maildir: To maildir/cur directory. -c Use the Content-Length: field, instead of the "From " line, as a mail separator for mbox. -d path Path to mbox/maildir. If path is a file, mbox is assumed. If path is a directory, maildir is assumed. -m path The same as the -d option. -s Read one mail from stdin instead of mbox/maildir. -i inboxdir A path to the inbox directory. -u Don't touch ".mew-mtime". -f Preserve Unix From (Envelope Sender) line in mbox case. -p mode Specify file mode that creates in mbox case. -o Use the suffix when creating messages. -x suffix Use this suffix. -h Display this help message. -v Display the version. mbox For mbox, the mail separator is "From " in the beginning of lines. The incm utility does not convert ">From " to "From " in the beginning of lines in the body. On Solaris, Content-Length: should be used with the -c option to tell the end of mail. To lock mbox, a lock file("<user>.lock"), flock() or lockf(), and open(O_EXLOCK) are used. maildir For maildir, no lock and no separator are necessary. Consider the following situation: cur/{1,2} new/{3,4} Executing incm without the options results in: cur/{1,2} new/{} to inbox: {3,4} Executing incm with the -a option results in: cur/{} new/{} to inbox: {1,2,3,4} Executing incm with the -b option results in: cur/{1,2,3,4} new/{} to inbox: {3,4} Executing incm with the -a option and the -b option results in: cur/{1,2,3,4} new/{} to inbox: {1,2,3,4} So, if both options are specified, messages are retrieved multiple times. December 25, 2001 INCM(1)