Email Support for STARTTLS on Outgoing

[JCrew]

Could somone confirm if  STARTTLS is a supported encription type?

We are trying to utilize our own O365 email service for outgoing emails and not finding that option. SSL and TLS fail to connect in any configuration on port 587.

Please advise if there is another best practice for dealing with O365 services in ServiceNow.

[robpickering]

Josh,

It should certainly be possible, here is the documentation on the email properties:   Additional email properties

You'll want to look at the following:

• glide.smtp.secure
• glide.smtp.tls

What I couldn't find was anything on leveraging port 587.   Normally, SMTP server-to-server communication would happen over Port 25 (SMTP).   Email client-to-server for SMTPS would happen over 465 or 587.   ServiceNow is acting as a Mail Transfer Agent (MTA) not a Mail User Agent (MUA) which would leverage those ports.  

A normal STARTTLS can (and should) happen over port 25 on a properly configured mail server.   Client software (like Outlook) would send email to a mail server over port 587 if it wanted encrypted communications, but that's not how server-to-server would work.

-Rob

[JCrew]

Hi Rob,

Thank your for your response!

Sounds like option 1 (client submission) then is not supported by ServiceNow?

https://support.office.com/en-us/article/How-to-set-up-a-multifunction-device-or-application-to-send...

Thanks,

Josh Crew

[robpickering]

That would be my understanding, as we are acting as another mail server, not a client.   If this is important for you to have support for, I'd open a HI ticket and/or an Enhancement Request with your specific use case.

-Rob