DNS issue

[Mohamed_kamal]

i have fortimail 200d and fortigate 200D

when i send any mail replay me postmaster is (reason: 550 *** The HELO for IP address 41.38.52.75 was '[41.38.52.75]' (valid but not recommended syntax )

i contact with senderbase team to know why added my IP to blacklist and replay me that 

To this end, we are seeing reports of HELO strings which do not match the PTR / rDNS of the IP. One of the HELO string we are seeing  “[41.38.52.75]”  which is not exact matches to the PTR of the IP 41.38.52.75  (mail.elashrygroup.com).

how to resolve ip to HELO  ? 

please  help me 

[Bromont_FTNT]

Best to open a support ticket and analyse traffic through the FGT unit.

[Mohamed_kamal]

mail # exec telnet  alt1.gmail-smtp-in.l.google.com:25

Connected

 

220 mx.google.com ESMTP p204si6007982lfp.301 - gsmtp

 

Entering interactive mode. Type CTRL-D to exit.

ehlo mail.elashrygroup.com

250-mx.google.com at your service, [41.38.52.75]

250-SIZE 10485760

250-8BITMIME

250-ENHANCEDSTATUSCODES

250 SMTPUTF8

i solved this error now i can telnet 

i want fix last error ( HELO is mismatching )