Hi,
I am a Project Manager in a software development company.
We are working on a project in which we have to provide an interface to our client to add domains which will be allowed relaying from his Linux server having sendmail installed.
We have sendmail 8.11.6 installed on the server.

Suppose we want to allow relaying for domainname.com. We have 2 options:
1. Add FEATURE(`access_db') in sendmail.mc file and Add
domainname.com RELAY
in access file and makemap hash access to make access.db.
2. Add FEATURE(`relay_entire_domain') in sendmail.mc and Add
domainname.com
in relay-domains file.

We have tried both the option but we are not able to allow relaying to nethues.com.
We are getting error as: Relaying temporarily denied. Cannot resolve PTR record for 222.154.20.11', Port: 25, Secure(SSL): No, Server Error: 450, Error Number: 0x800CCC79


Could anyone Please let me know what should be done in this situation.
Thanks in advance for your time.

Best Regards,
Atin Kapoor

Assuming the 222.xxx.xxx address you gave is the address of your sendmail server, you might want to make sure your DNS reverse lookups are correct for that server.