I am using the following google php library for authenticate the email address.Here is the link:
Library:
Example file :
This code is working fine on local server but on client server it is not validating. and on my client's server it is giving the following error:
550-Please turn on SMTP Authentication in your mail client, or login to the
550-IMAP/POP3 server before sending your message. ns500.mycyberhosting.com
550-(bebazar.be) [149.5.18.169]:53930 is not permitted to relay through this
550 server without authentication.
if this is the issue of SMTP Authentication than please let me know how to enable SMTP Authentication on client server.
Thanks in advance