i created a scheduler job that sends emails to assigned user’s mail and other 2 mails but sends some and fails and found
“MAIL FROM command failed Detail: Message submission rate for this client has exceeded the configured limit
SMTP code: 421 Additional SMTP info: 4.4.2
”
in log
What is your email server?
Are you sure your job isn’t running too many times, or in a loop, or repeatedly for the same user…?