MTA exception or whitelist

[MartinsBonders]

Hello!

I have Zimbra 8.6 and I have enabled such MTA settings:
1. Sender address must be fully qualified
2. DNS checks: Client's IP
3. DNS checks: Hostname in greeting

I am trying to send Zabbix alerts from external server with public IP and I logically get error: cannot find your hostname.

Is there some way how to make some exception or bypass some IP address from these MTA checks? Create some whitelist or something like that?
There always will be some external host without reverse DNS and i need some how to allow send e-mails from these hosts.

Thank you.

[phoenix]

If you're sending alerts to your mail server (from an external monitor server) then you should submit those emails vai the Submission port 587, that will also require authentication.

[MartinsBonders]

If you're sending alerts to your mail server (from an external monitor server) then you should submit those emails vai the Submission port 587, that will also require authentication.

I get such error:

Warning: XXX does not resolve to address ZZZ: Name or service not known
: connect from unknown[ZZZ]
NOQUEUE: reject: RCPT from unknown[ZZZ]: 554 5.7.1 <unknown[ZZZ]>: Client host rejected: Access denied; from=<AAA> to=<BBB> proto=ESMTP helo=<CCC>

[phoenix]

You're not actually giving much information about what you're doing, are you using port 587 or port 25 or something else?

[MartinsBonders]

You're not actually giving much information about what you're doing, are you using port 587 or port 25 or something else?

Yes, i am using 587 port with authentification.