Exchange Server 2013 sending external not working

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ditavejseli-5945 asked · Feb 18 at 10:11 PM

Exchange Server 2013 sending external not working

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]: /answers/storage/attachments/69689-dns.jpg [2]: /answers/storage/attachments/69690-dc01dns.jpg [3]: /answers/storage/attachments/69811-smtp.jpg [4]: /answers/storage/attachments/69821-nslookup.jpg [5]: /answers/storage/attachments/69822-mx-records.jpg [6]: /answers/storage/attachments/69812-dns-zone-azure.jpg

office-online-server-exchange

dns.jpg (71.7 KiB)

dc01dns.jpg (107.4 KiB)

smtp.jpg (99.9 KiB)

nslookup.jpg (88.0 KiB)

mx-records.jpg (71.8 KiB)

dns-zone-azure.jpg (185.7 KiB)

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Answer 1 · 2021-02-19T08:57:57.23Z

EricYin-MSFT answered · Feb 19 at 08:57 AM

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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Answer 2 · 2021-02-19T23:35:04.023Z

ditavejseli-5945 answered · Feb 19 at 11:35 PM

Thanks for your suggestion!

I edited the PRT

I have created a new Send Connector
![70236-gerti.jpg][2] [2]: /answers/storage/attachments/70236-gerti.jpg

what am I doing wrong here, please

gerti.jpg (81.6 KiB)

dnszone.jpg (169.0 KiB)

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EricYin-MSFT · 6 days ago

Hi,
would you try creating PTR locally?
It seems you are using local DNS by default.

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EricYin-MSFT EricYin-MSFT · 3 days ago

I am writing here to confirm with you how the thing going now?
If you need further help, please provide more detailed information, so that we can give more appropriate suggestions.

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Answer 3 · 2021-02-28T17:18:01.34Z

ditavejseli-5945 answered · yesterday

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

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