7,925 questions
Exchange 2016 and a problem with SMTP on Thunderbird.
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drClays
151
Reputation points
Hello,
in my company, I have Exchange on-premise 2016 server. I have configured IMAP/POP3 services.
I have a problem when I try to send emails from the company network via Thunderbird, if I do this from outside the company network it's working.
OWA and SMTP configuration:
I tried this on 587 port and 465.
In my house network, it's working on 465 port.
Where can I have a problem?
Exchange | Exchange Server | Management
{count} votes
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Aaron Xue-MSFT 2,596 Reputation points Microsoft External Staff2022-02-28T05:06:31.023+00:00 Hi @drClays ,
I would confirm that could you log on the Exchange account on the outlook when you in company?
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drClays 151 Reputation points
2022-03-01T14:54:33.877+00:00 Yes, I can. OWA and Outlook working.
I checked a few things.External DNS:
mx set on mail.domain.com
- 2.3.4 "A" mail.domain.com
- 2.3.4 "A" owa.domain.com
- 2.3.4 "A" autodiscover.domain.com
Internal DNS:
mail.domain.com - 10.0.0.150 - FortiMail
owa.domain.com - 10.0.0.120 - Exchange Server
autodiscover.domain.com - 10.0.0.120 - Exchange ServerFortiGate Firewall Policy:
- 2.3.4 [port 25] -> 10.0.0.150 [port 25]
- 2.3.4 [port 465] -> 10.0.0.150 [port 465]
- 2.3.4 [port 993] -> 10.0.0.120 [port 993]
- 2.3.4 [port 995] -> 10.0.0.120 [port 995]
- 2.3.4 [port 443] -> 10.0.0.120 [port 443]
That's what I saw:
Internal network:
When I configure IMAP settings on Outlook and I set servers on owa.domain.com then I can receive emails and send emails.
When I configure IMAP settings on Thunderbird and I set servers on owa.domain.com then I can receive emails but I can't send emails.
When I configure IMAP settings on Thunderbirds and I set servers on mail.domain.com then I can receive emails and send emails.External network:
When I configure IMAP settings on Outlook and I set servers on owa.domain.com then I can receive emails and send emails.
When I configure IMAP settings on Thunderbird and I set servers on owa.domain.com then I can receive emails and send emails.In exchange Send Connector is set up on 10.0.0.150 - FortiMail
FortMail Settings:
I
Why on Thunderbrid server settings don't work on owa.domain.com?
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Aaron Xue-MSFT 2,596 Reputation points Microsoft External Staff
2022-03-04T05:21:24.327+00:00 Hi @drClays ,
Thanks for you update. Glad to know that the Thunderbird works fine in your environment after you change the IMAP settings.
I am more than willing to help you out, but Thunderbird is currently not supported in the Q&A forums. the supported products are listed over here: https://learn.microsoft.com/en-us/answers/products (more to be added later on).
For the related questions about Thunderbird, you could open a ticket with Thunderbird wait for them to give you a solution.
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