'Invalid recipient error XAMP SMTP Sendmail

Please sendemail was configured in sendmail.ini for xammp using SMTP. The email delivers to other external domains except for the SMTP domain(internal) to which I get "Invalid recipients" error in the error log. I have checked the configuration over and over And I can't seem to figure out what is wrong

phpsmtpclient


Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source

Related Questions