 | | | Sendmail Not reporting FQDN to Smart Relay? | Sendmail Not reporting FQDN to Smart Relay? 2005-01-19 - By Montz, James C. (James Tower)
Back
Due to our network architecture, we use a Firewall to serve as a smart
mail relay for all Linux Servers.
I have had continued issues getting it to work properly.
The issue appears to be that the firewall will reject mail from hosts
that do not report their FQDN, responding with Data Format Error.
I thought I had found the solution by defining both the SMART_HOST and
the confDOMAIN_NAME in my MC file, but this does not appear to be it.
Here are the 2 sections from sendmail.mc
define(`SMART_HOST',`smtp.firewallserver.com')
define(`confDOMAIN_NAME',`fqdn.newserver.com')
Resulting in these entries in sendmail.cf
DSsmtp.firewallserver.com
Djfqdn.newserver.com
I have compared /etc/mail/sendmail.cf, /etc/mail/sendmail.mc,
/etc/mail/local-host-names, and /etc/sysconfig/network, and verified
hostname reported via the command hostname
Finding no difference between a working system, and a new system that
all mail is being rejected.
Can someone please enlighten me as to how you get Sendmail to report
it's FQDN when sending mail??
Thanks!
James
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