I was trying to set up a password reset account for my website using your SMTP server and kept getting an authentication error.  After exhausting everything I could think of I changed my password to something much simpler and shorter and it started working. Here is the 25 character password I was trying to use:

(removed PII)

I'm not sure if there is a special character it didn't like or if it was the length but I could log into the account at hotmail.com just fine with it.

Can you tell me what the password restrictions are for SMTP authentication?