{{#translate}}These settings are required to send out e-mail messages{{/translate}}

{{#translate}}Mailtrain is able to use VERP based routing to detect bounces. In this case the message is sent to the recipient using a custom VERP address as the return path of the message. If the message is not accepted a bounce email is sent to this special VERP address and thus a bounce is detected.{{/translate}}

{{#translate}}To get VERP working you need to set up a DNS MX record that points to your Mailtrain hostname. You must also ensure that Mailtrain VERP interface is available from port 25 of your server (port 25 usually requires root user privileges). This way if anyone tries to send email to someuser@verp-hostname then the email should end up to this server.{{/translate}}

{{#translate}}VERP usually only works if you are using your own SMTP server. Regular relay services (SES, SparkPost, Gmail etc.) tend to remove the VERP address from the message.{{/translate}}

{{#translate}}Only messages that are encrypted can be signed. Subsribers who have not set up a GPG public key in their profile receive normal email messages. Users with GPG key set receive encrypted messages and if you have signing key also set, the messages are signed with this key.{{/translate}}

{{#translate}}Do not use sensitive keys here. The private key and passphrase are not encrypted in the database.{{/translate}}

{{#translate}}If you are using ZoneMTA then Mailtrain can provide a DKIM key for signing all outgoing messages. Other services usually provide their own means to DKIM sign your messages{{/translate}}

{{#translate}}Do not use sensitive keys here. The private key is not encrypted in the database.{{/translate}}