SERVER -&gt; CLIENT: 220-webserver.programers.in ESMTP Exim 4.99 #2 Sun, 15 Mar 2026 18:27:18 +0530 220-We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail.<br>
CLIENT -&gt; SERVER: EHLO mail.web.ipakerala.com<br>
SERVER -&gt; CLIENT: 250-webserver.programers.in Hello mail.web.ipakerala.com [::1]250-SIZE 52428800250-LIMITS MAILMAX=1000 RCPTMAX=50000250-8BITMIME250-PIPELINING250-PIPECONNECT250-AUTH PLAIN LOGIN250-STARTTLS250 HELP<br>
CLIENT -&gt; SERVER: STARTTLS<br>
SERVER -&gt; CLIENT: 220 TLS go ahead<br>
SMTP Error: Could not connect to SMTP host.<br>
CLIENT -&gt; SERVER: QUIT<br>
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SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting<br>
Mailer Error: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting