check if sender MX points to bogon IP or hostname (localhost, 127.0.0.1, ::1)

[jh0rv4t]

Hi

Is there a check in FortiMail (like in http://www.postfix.com/postconf.5.html#smtpd_sender_restrictions) to reject/drop mails if senders domain MX points to bogon A/MX record:

check_sender_mx_access:

127.0.0.1 REJECT
localhost REJECT

...

[AEK]

Never seen such check on FortiMail.

[jh0rv4t]

>nslookup -type=mx dtcinfy.com 1.1.1.1

dtcinfy.com MX preference = 300, mail exchanger = localhost

so email (spam?) from @dtcinfy.com is then stuck in dead mail queue/loop....

it should never been accepted in the first place.

SAV (sender address verification) could help in this case. How is this done in FortiMail?

[AEK]

May be I missed something but I don't understand why an e-mail from a sender that has MX 127.0.0.1 should be considered as SPAM.

As far as I know when a mail is received then DNS records like PTR, SPF and DKIM are checked but not MX.

[jh0rv4t]

It should be considered as invalid or not rfc compliant atleast.

i see no sense in accepting email from domain that does "not want" to accept one itself.