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When from a remote host, I send email to my system, the session transcript is: "mail.sandarh.com. config error: mail loops back to me (MX problem) 554 5.3.6 Local configuration error." mail.sandarh.com is the mail MX record for the domain. Any help? Thanks in advance.

I have OpenBSD set up on my server, providing DNS, NAT, and sendmail services, but remote hosts are unable to establish a SMTP connection. All else works except remote hosts sending email to my server. Have customized a 'sendmail.cf' and DNS tables, but always have same result. Thanks much in...

I use pf filtering, but it is passing port 25 unrestricted.

Thanks again. I've done all that, and everything works except receiving mail from a remote host. I have a sendmail book that I am studying, which helps also. Also my ISP has been helping me look for any DNS and sendmail issues. Thanks.

Thanks, I found the MTA and MSA DAEMON_OPTIONS you indicated, and changed the ip (from 0.0.0.0) to the mail ip, with no change. Any other thoughts? Thanks much.

I just set up sendmail on openbsd, and I can send and receive email locally, and can send email to a remote host, but cannot receive email from a remote host. Email from a remote host fails with the error message "unable to make an smtp connection". NMap says that the SMTP port 25 is...