DNS issue

Forum|Forum|9 years ago
September 26, 2016
2 replies
40055 views

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

Staff

When you edit your domain (Mail Settings ---> Domains) What do you have set under Advanced --> SMTP Greeting?

Mohamed_kamalAuthor

New Member

use system host name

emnoc

New Member

HELLO ( pun intended )

yes bu it MATCH your system-hostname of the device doing the HELO?

SOCKET1:~ kfelix$ host 41.38.52.75 75.52.38.41.in-addr.arpa domain name pointer mail.elashrygroup.com. SOCKET1:~ kfelix$ host -t a mail.elashrygroup.com. mail.elashrygroup.com has address 41.38.52.75 SOCKET1:~ kfelix$

DNS is one thing, but if the string in EHLO/HELO does not matched, it looks like a forged SMTP connection and any ESA or MX-gw could drop the connections.

Ken

Mohamed_kamalAuthor

New Member

First whats wrong on dns ? how to match HELO on my system host ae ?

emnoc

New Member

1st does the cli get system status | grep ostname

does it match your above DNS name { mail.elashrygroup.com } ? ( yes or no )

2nd if no, than you need to set the "system" name in your protect domain as listed earlier when you start the thread

3rd re-test

4th monitor the FML logs for errors

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