Hi,
we have installed 2 x ESA C190 in cluster. all MX Record, A Record, PTR record is configured on public DNS. now both ESA are in production and sending and receiving emails.
we are facing one issue on ESA1 while sending email to one particular domain on internet.
for example when i do a telnet to that domain from ESA1 we are getting error
on ESA1
telnet example.cisco.com 25
Trying 1.1.1.1...
Connected to example.cisco.com.
Escape character is '^]'.
450 4.7.1 Client host rejected: cannot find your reverse hostname, [2.2.2.2 ]
Connection closed by foreign host.
ESA2 is working fine
telnet example.cisco.com 25
Trying 1.1.1.1...
Connected to example.cisco.com.
even though we have configured Reverse DNS but when i do a SMTP mail test on mxtoolbox for ESA1 we are grtting this error
we have configured Reversed DNS but somehow its not working
when i do A record test for ESA1 then its show its ok for ESA1
but when i do SMTP test then its shows Reverse DNS is not a valid Hostname for ESA1
i am not able to understand if i do A record test for ESA1 then its show its ok but when i do SMTP test for ESA1 its giving Reverse DNS is not a valid Hostname.
