Bug #74005 [Com]: mail function duplicates FROM header

Edit report at https://bugs.php.net/bug.php?id=74005&edit=1 ID: 74005 Comment by: cafbca62 at opayq dot com Reported by: andy_schmidt at HM-Software dot com Summary: mail function duplicates FROM header Status: Open Type: Bug Package: Mail related Operating System: Windows PHP Version: 7.0.15 Block user comment: N Private report: N New Comment: I confirm the problem. My Wordpress on IIS after update to PHP 7 has started creating this trouble. Previous Comments: ------------------------------------------------------------------------ [2017-01-26 23:11:08] andy_schmidt at HM-Software dot com Description: ------------ Since version 7 the Windows implementation of mail() duplicates the "From:" header, e.g.: Date: Thu, 26 Jan 2017 17:48:13 -0500 Subject: test subject To: recipient@test.com X-PHP-Originating-Script: 0:andytest.php From: duplicated@test.com From: duplicated@test.com Under version 5 (e.g., 5.3.28) and prior there is only ONE "From:" header. Gmail has now started to outright BLOCKING PHP generated emails due to "ambiguous" "from" information, therefore escalating this matter to one of highest priority. Here the SMTP status code from gmail when delivery is attempted by PHP 7 (works with PHP 5): 550-5.7.1 [74.201.226.50 11] Our system has detected that this message is 550-5.7.1 not RFC 5322 compliant: 550-5.7.1 Multiple 'From' headers found. 550-5.7.1 To reduce the amount of spam sent to Gmail, this message has been 550-5.7.1 blocked. Please visit 550-5.7.1 https://support.google.com/mail/?p=RfcMessageNonCompliant 550 5.7.1 and review RFC 5322 specifications for more information. d4si1478127qtf.33 - gsmtp Test script: --------------- <?php $result = mail( "recipient@test.com", "test subject", "test content", "From: duplicated@test.com\r\n" ); ?> ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=74005&edit=1