Does the default email sender in TDx use OAuth 2.0 or SMTP?

Hi all,

I've been trying to find information on what the default email sender uses for security protocol and how those emails look upon receipt, but have come up dry. Right now we are using the custom SMTP settings, but our college is moving away from SMTP to either OAuth or SMTP relay if OAuth is not possible. 

Any information would be helpful.


Tags email oauth smtp
Asked by Damon Stennett on Fri 1/20/23 2:14 PM Last edited Fri 1/20/23 5:18 PM
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Answer (1)

This answer has been marked as the accepted answer
Mark Sayers Fri 1/20/23 2:35 PM

Hello Damon,

The default sender is our AWS sender which is also facilitated via SMTP.

It sounds like your best bet is to go with an SMTP relay since we do not yet have a way to support OAuth for mail server connections for outbound mail delivery.

1 of 1 users found this helpful.
Thanks Mark! - Damon Stennett Fri 1/20/23 2:40 PM
Mark, I've been asked - "Can you ask them what source IPs they use to send emails? So that we can add them to the firewall allow list." - Damon Stennett Fri 1/20/23 2:45 PM
It should be these IPs: - Mark Sayers Fri 1/20/23 2:50 PM
Hi Mark, I just attached a screenshot which shows that from our logs it looks like TDx used different IPs to send emails from the ones that you provided. Is this expected? - Damon Stennett Fri 1/20/23 5:20 PM
Our default mail sender is Amazon SES, so you could see IPs from their mail systems as well. - Mark Sayers Mon 1/23/23 10:11 AM