how to disable phpmailer showing configuration details on browser

Question

I have no idea why the email configuration details and status shown on my page upon successful email sending. How to disable it?

The messages:

SERVER -> CLIENT: 220 mx.google.com ESMTP ss3sm18138445pab.43 - gsmtp
CLIENT -> SERVER: EHLO localhost SERVER -> CLIENT: 250-mx.google.com
at your service, [IP ADDRESS]250-SIZE 35882577250-8BITMIME250-STARTTLS250-ENHANCEDSTATUSCODES250-PIPELINING250-CHUNKING250
SMTPUTF8 CLIENT -> SERVER: STARTTLS SERVER -> CLIENT: 220 2.0.0 Ready to start
TLS CLIENT -> SERVER: EHLO localhost SERVER -> CLIENT: 250-mx.google.com at your service, [IP ADDRESS]250-SIZE 35882577250-8BITMIME250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN XOAUTH250-ENHANCEDSTATUSCODES250-PIPELINING250-CHUNKING250 SMTPUTF8 CLIENT -> SERVER: AUTH LOGIN SERVER -> CLIENT: 334 VXNlcm5hbWU6 CLIENT -> SERVER: a2FsYWl2YW5pLmRjQGdtYWlsLmNvbQ== SERVER -> CLIENT: 334 UGFzc3dvcmQ6 CLIENT -> SERVER: bG92ZWlzbGlmZTg5 SERVER -> CLIENT: 235 2.7.0 Accepted CLIENT -> SERVER: MAIL FROM:<'email address'> .....................................

Answer 1

You can set $phpmailer->SMTPDebug=0; to prevent showing debug messages.