How do I test outgoing SMTP settings?

290748?v=4
Reilly B wrote...
Hi, I have set the SMTP settings for Sendgrid but can't find any way to test them?

Also, do I need to run a worker?

Thanks!
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      290748?v=4
      Reilly B replied...
      UserMailer.new_user(1, 'test').deliver
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