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Configuring Email Settings > Email connectivity testing
Email connectivity testing
If you think that inbound or outbound messages are not being delivered, use the mail testing options to check connectivity. The inbound mail test checks your MTAs and performs testing for the domain you specify, optionally based on sender and recipient addresses. The outbound mail test requires sender and recipient information to perform checks on whether mail is being routed correctly.
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Inbound mail testing
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Outbound mail testing
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Viewing results
Inbound mail testing
To perform an inbound mail test:
1.
Go to Email > Messages > Toolbox.
2.
Select the Inbound Mail Test tab.
3.
Select the domain you wish to check against.
4.
Optionally, enter a sender address.
5.
Optionally, enter a recipient address.
6.
Click Run Test.
Running the test does the following for all the connections and mail routing rules that apply to the specified domain:
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Checks connectivity to your MTA
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Performs a full SMTP test
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Checks TLS functionality
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Generates a message from the cloud email service to your selected domain
If one of these tests fails, subsequent tests are not performed.
Outbound mail testing
To perform an outbound mail test:
1.
Go to Email > Messages > Toolbox.
2.
Select the Outbound Mail Test tab.
3.
Enter a sender address. This must be for a domain registered and checked with your cloud service account.
4.
Enter a recipient address.
5.
Click Run Test.
Running the test does the following:
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Checks the outbound route connectivity to the recipient domain
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Generates a message from the cloud email service to your selected recipient domain using TLS
Viewing results
Feedback is displayed in a popup on screen while the tests are running, and results are displayed on the page once available. Click Download Full Results to download detailed results to a text file in a location of your choice.
You may see one or more of the following in your results:
Problem
Resolution
SMTP Test Failure
The cloud service could not connect to port 25 on your connection. Confirm port 25 is open, and also check the text file for traceroute results for that connection, to see where the connectivity error occurs.
Server Security Error
The cloud service could not connect to your domain using the security settings specified in the connection. This may be due to one of the following:
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the host name could be verified against the certificate. Ensure the common name on the certificate matches the MTA with which the cloud service is communicating.
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The security settings are set to Encrypt or Encrypt+CN and the certificate is not from a trusted certificate authority (CA).
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The connection does not support the encryption strength set in the policy (encryption algorithms must support a 128 or 256 bit key).
TLS error
The cloud service could not send a message to either the connection or the mail recipient using TLS. If you have enabled mandatory TLS, ensure all security settings between the cloud service, your MTAs, and all required third-party MTAs are configured correctly.
Outbound route connectivity failure
The cloud service could not connect to the recipient domain's MTA. This may be because port 25 is not open, or because the connection attempt timed out.

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Configuring Email Settings > Email connectivity testing
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