#39507 [Opn]: concurrent attempts to connect to SMTP relay fail miserably

ID: 39507 User updated by: rherror404 at gmail dot com Reported By: rherror404 at gmail dot com Status: Open Bug Type: Mail related Operating System: Windows PHP Version: 5.2.0 New Comment: Is the mail() function sufficiently thread-safe under the Windows MPM (for Apache)? I have to wonder if the two concurrent threads are stepping on each other in their efforts to talk to the SMTP box. Previous Comments: ------------------------------------------------------------------------ [2006-11-14 03:51:51] rherror404 at gmail dot com To clarify, the bash snippet should read like this (see below). Line 14 contains the call to mail(). ======================================== $ (curl "http://192.168.1.2/error.php" &); (curl "http://192.168.1.2/error.php" &) $ Warning: mail(): SMTP server response: 503 5.0.0 foo.bar.com Duplicate HELO/EHLO in C:\Program Files\Apache Group\Apache2\htdocs\error.php on line 14 FALSE Warning: mail(): Failed to Receive in C:\Program Files\Apache Group\Apache2\htdocs\error.php on line 14 FALSE $ ------------------------------------------------------------------------ [2006-11-13 23:33:06] rherror404 at gmail dot com s/on line 107/on line 14/g ------------------------------------------------------------------------ [2006-11-13 23:31:26] rherror404 at gmail dot com Description: ------------ Hitting this script with two concurrent requests causes a failure of both, each reporting different errors. $ (curl "http://192.168.1.2/error.php" &); (curl "http://192.168.1.2/error.php" &) $ Warning: mail(): SMTP server response: 503 5.0.0 foo.bar.com Duplicate HELO/EHLO in C:\Program Files\Apache Group\Apache2\htdocs\error.php on line 107 FALSE Warning: mail(): Failed to Receive in C:\Program Files\Apache Group\Apache2\htdocs\error.php on line 107 FALSE $ Reproduce code: --------------- <? define('EXTRAHEADERS', "MIME-Version: 1.0\r\nContent-type: text/html; charset=iso-8859-1\r\nX-Mailer: PHP\r\n"); define('MAILMSG', "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\"> <html><head><title>foo</title><style type='text/css'> body {margin: 0; font-size: 10pt; font-family: sans-serif, arial; color: #000000; background-color: #ffffff;} </style></head><body><div style='font-size: 12pt; background-color: #ffff00;'>" . date("Y-m-d H:i:s") . "</div> random junk<br />" . str_repeat("afhlkhsad;lfj;lkjsa;lfjasd;lkjf;lkjsad;lkfjsad;lkfjsad;lkfjasd;lfkjasd;lkfjsa;ldf<br />\n", 100) . "</body></html>"); ini_set('html_errors', FALSE); ini_set('SMTP', '10.1.2.3'); // valid address for a SMTP relay ini_set('sendmail_from', 'foo <do_not_reply@foo123.com>'); // fake address define('MAILTO', 'something@thatworks.com'); // something real $retval = mail(MAILTO, 'foo', MAILMSG, EXTRAHEADERS); echo ( $retval ? 'TRUE' : 'FALSE' ). "\n\n\n"; exit(); ?> Expected result: ---------------- If I run multiple concurrent requests, then I expect to get multiple emails, one for each request. Actual result: -------------- The little shell command where I run two HTTP requests (using cURL in a Cygwin bash) concurrently causes a failure of both, each reporting different errors. It runs fine otherwise. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=39507&edit=1