Today we will learn how to fix SMTP error 530. Usually, an authentication problem. But sometimes it’s about the recipient’s server blacklisting you, or an invalid email address.
What’s the mean of SMTP 530 Error?
The specific error you receive should describe the exact problem, but it could mean any of the following:
- Invalid authentication. (wrong secret number).
- Blacklisted/blocked IP addresses.
- Invalid recipient email address.
How to fix this problem?
As with almost every ‘fix’, you’ll want to make sure the email address is correct and spelled correctly. Once confirmed, make sure your email user is authenticating correctly (login and password). Then, make sure your IP address is not blacklisted. If you want to know how does SMTP work? then you read this article. You can buy an SMTP server from Oudel Inc.
