Error with sending recipient(Relay denied)

This is most popular issue with send email with specified SMTP server. We'll explain why and also provide solutions in this article.

When ANSMTP sends email to SMTP server, SMTP server will detect if the recipient is a local user(mailbox is on the current server), if it is not, SMTP server will relay it to the remote server. But to stop the increasing spam, most SMTP servers disabled relaying email to remote server. That is why "Error with sending recipient" occurs when you are sending email to a remote recipient via your SMTP server.

To enable local user relay email to remote recipient, most SMTP servers provide ESMTP authentication. Once the user authentication succeeded, SMTP server will relay email to any domain without limitation.

How to ESMTP authentication?

You can just simply assign your user name and password to UserName and Password property, then ANSMTP will perform ESMTP authentication automatically before the email was sent. The user name and password is usually same as your pop3 user name and password.

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