Log on to the DirectMail console, go to Sender Addresses page, select the sender address used for SMTP, and set the SMTP password.
SMTP password rules have been updated to:
The password must be composed of 10 to 20 characters including numbers and case-sensitive letters.
There must be at least two numbers, two uppercase letters and two lowercase letters which cannot be single repeating characters.
The password cannot be the same as the previous password.