Starting test send...

SERVER -> CLIENT: 220-webhosting3001.is.cc ESMTP Exim 4.99.5 #2 Sat, 05 Sep 2026 03:21:55 -0400 
220-We do not authorize the use of this system to transport unsolicited, 
220 and/or bulk e-mail.

CLIENT -> SERVER: EHLO traveltechso.com

SERVER -> CLIENT: 250-webhosting3001.is.cc Hello traveltechso.com [68.168.220.234]
250-SIZE 104857600
250-LIMITS MAILMAX=1000 RCPTMAX=50000
250-8BITMIME
250-PIPELINING
250-PIPECONNECT
250-AUTH PLAIN LOGIN
250-STARTTLS
250 HELP

CLIENT -> SERVER: STARTTLS

SERVER -> CLIENT: 220 TLS go ahead

CLIENT -> SERVER: EHLO traveltechso.com

SERVER -> CLIENT: 250-webhosting3001.is.cc Hello traveltechso.com [68.168.220.234]
250-SIZE 104857600
250-LIMITS MAILMAX=1000 RCPTMAX=50000
250-8BITMIME
250-PIPELINING
250-PIPECONNECT
250-AUTH PLAIN LOGIN
250 HELP

CLIENT -> SERVER: AUTH LOGIN

SERVER -> CLIENT: 334 VXNlcm5hbWU6

CLIENT -> SERVER: [credentials hidden]
SERVER -> CLIENT: 334 UGFzc3dvcmQ6

CLIENT -> SERVER: [credentials hidden]
SERVER -> CLIENT: 535 Incorrect authentication data

SMTP ERROR: Password command failed: 535 Incorrect authentication data

SMTP Error: Could not authenticate.
CLIENT -> SERVER: QUIT

SERVER -> CLIENT: 221 webhosting3001.is.cc closing connection

SMTP Error: Could not authenticate.


❌ FAILED. PHPMailer's error message was:
SMTP Error: Could not authenticate.