I have an Ubuntu Linux VM hosted in Azure. I installed SendMail and configured it to use port 587 using this guide. https://bobcares.com/blog/linux-sendmail-port-587/

I understand that port 25 is blocked in Azure, and you must use 587, which requires authentication. I’m new to using SendMail, and I cannot find any decent guides on how to send test emails with an authenticated mailbox.

Please, could someone provide me with the details on how to do this or point me in the right direction?

Thank you