As a developer on a test server, it is essential for you to have full control over the emails being sent during application testing. Imagine that you are working on a project and constantly need to send test messages to a specific email address, allowing you to easily monitor email flows and perform automated tests.<\/p>\n\n\n\n
To facilitate this, Postfix, a popular mail transfer agent, provides a convenient configuration option. By making some changes to the Postfix configuration files on your test server, you can ensure that all outgoing emails are delivered to a single recipient. This centralizes and simplifies the email flow, providing you with a better overview during the testing process.<\/p>\n\n\n\n
Add the following to the end of the configuration file \/etc\/postfix\/main.cf:<\/p>\n\n\n\n
# Aangepaste toevoeging - alleen verzenden naar \u00e9\u00e9n e-mailadres.\nrecipient_canonical_classes = envelope_recipient\nrecipient_canonical_maps = regexp:\/etc\/postfix\/recipient_canonical_map\n<\/code><\/pre>\n\n\n\nIn the file \/etc\/postfix\/master.cf:<\/p>\n\n\n\n
Find the line that looks something like this (without the \"#\" in front of it):<\/p>\n\n\n\n
smtp unix - - n - - smtp\n<\/code><\/pre>\n\n\n\nImmediately after that, add the following line:<\/p>\n\n\n\n
-o smtp_header_checks=regexp:\/etc\/postfix\/smtp_header_checks\n<\/code><\/pre>\n\n\n\nCreate a new file \/etc\/postfix\/recipient_canonical_map and add the following:<\/p>\n\n\n\n
# Voer het e-mailadres in waarnaar je alle e-mails wilt laten bezorgen.\n# Bijvoorbeeld, mijn configuratie leest \"\/.\/ geoff+dev@garbers.co.za\"\n\/.\/ jouw@email.hier\n<\/code><\/pre>\n\n\n\nAlso, create a new file \/etc\/postfix\/smtp_header_checks and add the following:<\/p>\n\n\n\n
# Dit zal de hele onderwerpregel nemen en er \"[devmail]\" voor plaatsen, als een andere manier om het te filteren.\n\/Subject:(.*)\/ REPLACE Subject: [devmail] $1\n<\/code><\/pre>\n\n\n\nAfter you have updated and created these configuration files, reload Postfix by running the following:<\/p>\n\n\n\n
[~]# service postfix reload\n<\/code><\/pre>\n\n\n\nIf you have the mail command installed, send a test message to a nonexistent e-mail address:<\/p>\n\n\n\n
[~]# echo 'test' | mail -s 'test email' niemand@example.org\n<\/code><\/pre>\n\n\n\nTo deny and disable the connection, edit the file \/etc\/postfix\/main.cf:<\/p>\n\n\n\n
vi \/etc\/postfix\/main.cf\n<\/code><\/pre>\n\n\n\nComment out the following lines by placing \"#\" in front of them:<\/p>\n\n\n\n
# content_filter = amavis:[127.0.0.1]:10024\n# receive_override_options = no_address_mappings\n<\/code><\/pre>\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"