Stop live emails going out via sendmail

trapmail

#!/bin/bash

formail -R cc X-original-cc \
-R to X-original-to \
-R bcc X-original-bcc \
-f -A"To: new@email.com" \
| /usr/sbin/sendmail -t -i

# pipe all to a log instead, comment out formail code
#tee -a /tmp/trapmail.log > /dev/null

Apache config setting:

php_admin_value sendmail_path "/usr/local/bin/sendmail/trapmail > /dev/null"

or for php-fpm:

php_admin_value[sendmail_path] = /usr/local/bin/sendmail/trapmail > /dev/null

PHPMailer now does a "sanity check" on the sendmail_path to make sure it contains the string "sendmail"

put this script in /usr/local/bin/sendmail/trapmail instead to work round this issue.

Also PHPMailer library has hard coded the sendmail path on $mailer->Sendmail property instead of using ini_get("sendmail") so you now have to do the following to use trapmail with latest PHPMailer:

$mailer = new \PHPMailer(true);
$mailer->Sendmail = ini_get("sendmail_path");
$mailer->IsSendmail();

formail command is provided by the procmail package on CentOS 6