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I'm planning to send mass emails to gmail addresses via PHP mail function. To track email spam complaints i'm trying to setup a feedback loop with PHP but i'm not receiving any response from gmail. I've set header to PHP mail in the following format for PHP mail function:

$headers .= "Feedback-ID: CampaginABC:Customer123:CustomID:MyUniqueSenderID";

What are the best ways to track spam and bounce complaint Data?
Any Help would be greatly appreciated.

Gmail Feedback Loop Source:
https://support.google.com/mail/answer/6254652?hl=en&ref_topic=7279058

Vatsh Patel
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1 Answers1

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Feedback-ID header needs to be included in DKIM-Signature. If you are sending emails with Postfix and doing DKIM signing with OpenDKIM then you can configure it as follows :

add "SignHeaders Feedback-ID" to /etc/opendkim.conf

and reload opendkim,postfix

/etc/init.d/opendkim reload

/etc/init.d/postfix reload

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Email geek
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