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Editorial Team
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Asked: 2026-05-12T20:49:38+00:00

I used a PHP library to try and use my gmail account to send

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I used a PHP library to try and use my gmail account to send mails. Just an experiment, to see if I can set it up. After succesfully completing the send() method, I request debug information. This is what was shown to me:

220 mx.google.com ESMTP g9sm901968gvc.25
250 mx.google.com at your service
530 5.7.0 Must issue a STARTTLS command first. g9sm901968gvc.25
530 5.7.0 Must issue a STARTTLS command first. g9sm901968gvc.25
530 5.7.0 Must issue a STARTTLS command first. g9sm901968gvc.25
530 5.7.0 Must issue a STARTTLS command first. g9sm901968gvc.25
530 5.7.0 Must issue a STARTTLS command first. g9sm901968gvc.25
530 5.7.0 Must issue a STARTTLS command first. g9sm901968gvc.25
530 5.7.0 Must issue a STARTTLS command first. g9sm901968gvc.25

I can see that something must have gone wrong, but I have no idea what to make of this.

Also, I am working on Windows 7 with PHP here.

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1 Answer

  1. Editorial Team

    You need to issue a code 250 STARTTLS command to the server. You’ll probably want to make sure that the PHP mailer you’re using can handle TLS communications. I recommend SwiftMailer.

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