I've seen there is a way to configure Mail-Routing (lets say to external non ISPConfig Mailserver). Setup is like this: (Please correct me if I am wrong) Create an Emailrouting (e.g. firstname.lastname@example.org [single Mailadress] or domain.tld [whole Domain]). Create an Relay-Recipient [Email ⇒ Global Filter ⇒ Relay Recipient] by using the same as choosed for routing (single domain, or whole domain) My Questions: If I configured like above, Must an Email-Domain added on Ispconfig Must an Email-Account / Alias added for each Adress I wish to handle for this Relay-Setup Which connection (Username, Password, SMTP, POSTFIX) have to be used for the mail-client of the Mail-Account-Owner? [Maybe if previous 1. & 2. is YES, those Mail-Settings?] How does the Target-Server (external Mailserver) have to be configured to garant access for ISPCONFIG to send and recieve mails (if previos Answer 1 - 3 is Yes). Hope you can clearify this Routing stuff a bit for me.