Exchange Server 2013 sending external not working

dita vejseli 1 Reputation point
2021-02-18T22:11:26.187+00:00

I have a domain(DC01) and Exchange Server 2013(EX01,EX02) host in Azura. wild card cert installed. I can send mail internally and receive mail internally. I receive mail from an external source but I can't send external emails. The Firewall is set to allow ports 25, 587, 80, and 443. ![69689-dns.jpg][1] ![69690-dc01dns.jpg][2]![69811-smtp.jpg][3]![69821-nslookup.jpg][4] the problem lies with Reverse Entries for MX records https://www.dnsinspect.com/ mail.gerti.net ![69822-mx-records.jpg][5] This is the Configuration in Azure DNS Zone ![69812-dns-zone-azure.jpg][6] [1]: /api/attachments/69689-dns.jpg?platform=QnA [2]: /api/attachments/69690-dc01dns.jpg?platform=QnA [3]: /api/attachments/69811-smtp.jpg?platform=QnA [4]: /api/attachments/69821-nslookup.jpg?platform=QnA [5]: /api/attachments/69822-mx-records.jpg?platform=QnA [6]: /api/attachments/69812-dns-zone-azure.jpg?platform=QnA

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Eric Yin-MSFT 4,386 Reputation points
    2021-02-19T08:57:57.23+00:00

    Hi,
    The screenshots you post includes personal information, like domain name/IP address, please cover those information.
    It seems you don't have PTR record for the IP address that mail.contoso.com pointing to, can you try adding a PTR record in your DNS Zone? Create a DNS PTR record
    Also, the fqdn of your send connector misses "." in the fqdn, please correct it with Set-sendconnector(or create a new one, fqdn is blank by default): 

    Set-SendConnector "name" -fqdn mail.contoso.com

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  2. dita vejseli 1 Reputation point
    2021-02-19T23:35:04.023+00:00

    Thanks for your suggestion!

    I edited the PRT
    70173-dnszone.jpg

    I have created a new Send Connector
    ![70236-gerti.jpg][2] [2]: /api/attachments/70236-gerti.jpg?platform=QnA

    what am I doing wrong here, please

  3. dita vejseli 1 Reputation point
    2021-02-28T17:18:01.34+00:00

    unfortunately I haven't had time yet.
    I'll get back to you