postfix whitelist when PTR is delegated by ISP

Hi, I have a weird situation where Nagios alerts are sent to me from a customer and all are rejected because of

Helo command rejected: Host not found​

Or is it because the reverse DNS goes to some other name (default road-runner name) instead of the 'server' name?
Would it work if I actually whitelist the IP in postconf even if the PTR is delegated by road runner?
Thanks!

 

Hi Till,
Here's what I have that is not working

Code:

smtpd_helo_restrictions = permit_sasl_authenticated, permit_mynetworks, check_helo_access regexp:/etc/postfix/helo_access, reject_invalid_hostname, reject_non_fqdn_hostname, reject_invalid_helo_hostname, reject_unknown_helo_hostname, check_helo_access regexp:/etc/postfix/blacklist_helo

And here's what is in /etc/postfix/helo_access:

Code:

# helo_access - before permit_sasl
# be sure to list your own hostname(s), domain(s) and IP address(es) here

# Reject others identifying with this machine's hostnames and IP addresses
#/^inferno\.cocoanet\.us$/  REJECT
#/^((smtp|mx|mail)\.domain1\.com$/	REJECT
#/^mail\.domain2\.com$/		REJECT

# TODO: this server's ip addr loop here
#/^\[?1\.2\.3\.4\]?$/	REJECT
#/^\[?12\.34\.56\.78\]?$/	REJECT
#/^\[?123\.234\.123\.234\]?$/	REJECT

# Reject others identifying as domains we host
# TODO: this server's hosted mail domains loop here
#/^domain1\.com$/	REJECT
#/^domain2\.com$/	REJECT
#/^domain3\.net$/	REJECT

/\[?70\.62\.212\.82\]?/	PERMIT

 

Adding the hostname from the 'helo' seems to be working! Here's what I added to

/etc/postfix/helo_acces

Code:

/^\[?70\.62\.212\.82\]?$/    PERMIT
/^it\-workstation\-host\.ad\.sfpi\.com$/    PERMIT

 

Thanks!