Hello ,

Is is a cause to some domains reject my mails .

and how can I solve the below

Hello

set ptr record :)

https://mxtoolbox.com/problem/smtp/smtp-banner-check?page=prob_smtp&action=smtp:91.83.45.53&showlogin=1&hidepitch=1&hidetoc=0

Hello

set ptr record :)

https://mxtoolbox.com/problem/smtp/smtp-banner-check?page=prob_smtp&action=smtp:91.83.45.53&showlogin=1&hidepitch=1&hid

Hello

check your receive conecctor settings.
Get-ReceiveConnector internetreceiveconnectorname |fl and  share please output.
check <label for="ResultPanePlaceHolder_ReceiveConnector_Security_contentContainer_chkAuthMechanismTls" id="ResultPanePlaceHolder_ReceiveConnector_Security_contentContainer_chkAuthMechanismTls_label">Transport Layer Security (TLS) enbled on receive connector</label>

check certificate for binding smtp services with:
Get-ExchangeCertificate |fl services

one need binding to smtp services

Hi,

I find an similar thread about your question, for you reference:
https://social.technet.microsoft.com/Forums/office/en-US/50ec9479-087f-4ba5-8384-9f0337b217b9/warning-reverse-dns-does-not-match-smtp-banner?forum=exchangesvradmin

"Reverse DNS (aka PTR record) is something set at your ISP level, not on your Exchange server. If you have a static IP from your provider you should be able to contact them (or log into the ISP's portal) to change the reverse DNS. If you have a dynamic IP (meaning you didn't pay extra for a static) you will be unable to set your reverse DNS.

The implication's of not having a matching reverse DNS is that many email providers will not allow you to send them email (ex. aol.com, hotmail.com). I am actually in the same boat (on a dynamic IP) but I set up my Exchange to send all my email through a spam filter service. If you send through a reputable spam filter you should have no issues sending to any email providers (even though reverse DNS checks will still fail). "