2026-05-05 15:59:21 SERVER -> CLIENT: 220 mx.zoho.in SMTP Server ready May 5, 2026 9:29:21 PM IST
2026-05-05 15:59:21 CLIENT -> SERVER: EHLO voltechgroup.com
2026-05-05 15:59:22 SERVER -> CLIENT: 250-mx.zoho.in Hello voltechgroup.com (darnell.nocdirect.com (205.251.137.66))250-STARTTLS250 SIZE 53477376
2026-05-05 15:59:22 CLIENT -> SERVER: STARTTLS
2026-05-05 15:59:23 SERVER -> CLIENT: 220 Ready to start TLS.
2026-05-05 15:59:23 CLIENT -> SERVER: EHLO voltechgroup.com
2026-05-05 15:59:23 SERVER -> CLIENT: 250-mx.zoho.in Hello voltechgroup.com (darnell.nocdirect.com (205.251.137.66))250-AUTH LOGIN PLAIN250 SIZE 53477376
2026-05-05 15:59:23 CLIENT -> SERVER: AUTH LOGIN
2026-05-05 15:59:24 SERVER -> CLIENT: 334 VXNlcm5hbWU6
2026-05-05 15:59:24 CLIENT -> SERVER: [credentials hidden]
2026-05-05 15:59:24 SERVER -> CLIENT: 334 UGFzc3dvcmQ6
2026-05-05 15:59:24 CLIENT -> SERVER: [credentials hidden]
2026-05-05 15:59:24 SERVER -> CLIENT: 235 Authentication Successful
2026-05-05 15:59:24 CLIENT -> SERVER: MAIL FROM:<vdms@voltechgroup.com>
2026-05-05 15:59:25 SERVER -> CLIENT: 250 Sender <vdms@voltechgroup.com> OK
2026-05-05 15:59:25 CLIENT -> SERVER: RCPT TO:<elangovan.d@voltechgroup.com>
2026-05-05 15:59:25 SERVER -> CLIENT: 250 Recipient <elangovan.d@voltechgroup.com> OK
2026-05-05 15:59:25 CLIENT -> SERVER: DATA
2026-05-05 15:59:25 SERVER -> CLIENT: 354 Ok Send data ending with <CRLF>.<CRLF>
2026-05-05 15:59:25 CLIENT -> SERVER: Date: Tue, 5 May 2026 15:59:21 +0000
2026-05-05 15:59:25 CLIENT -> SERVER: To: elangovan.d@voltechgroup.com
2026-05-05 15:59:25 CLIENT -> SERVER: From: Voltech Engineering Consultancy Services <vdms@voltechgroup.com>
2026-05-05 15:59:25 CLIENT -> SERVER: Subject: Zoho SMTP Test (PHP)
2026-05-05 15:59:25 CLIENT -> SERVER: Message-ID: <YZGODJY7p8j1iqQNk27cXp564tlDqlIpyLmCuFNqWZ4@voltechgroup.com>
2026-05-05 15:59:25 CLIENT -> SERVER: X-Mailer: PHPMailer 7.0.0 (https://github.com/PHPMailer/PHPMailer)
2026-05-05 15:59:25 CLIENT -> SERVER: MIME-Version: 1.0
2026-05-05 15:59:25 CLIENT -> SERVER: Content-Type: text/html; charset=iso-8859-1
2026-05-05 15:59:25 CLIENT -> SERVER:
2026-05-05 15:59:25 CLIENT -> SERVER: <h3>Test Email</h3><p>Sent using Zoho SMTP with TLS (587).</p>
2026-05-05 15:59:25 CLIENT -> SERVER:
2026-05-05 15:59:25 CLIENT -> SERVER: .
2026-05-05 15:59:26 SERVER -> CLIENT: 553 Sender is not allowed to relay emails
2026-05-05 15:59:26 SMTP ERROR: DATA END command failed: 553 Sender is not allowed to relay emails
SMTP Error: data not accepted.
❌ Mailer Error: SMTP Error: data not accepted. SMTP server error: DATA END command failed Detail: Sender is not allowed to relay emails
SMTP code: 5532026-05-05 15:59:26 CLIENT -> SERVER: QUIT
2026-05-05 15:59:26 SERVER -> CLIENT:
2026-05-05 15:59:26 SMTP ERROR: QUIT command failed: