Forwarding whitelist and/or preconfigured forward adresses

[muehmar]

We have a situation where the receiver of an email is determined by the application using third-party services which may deliver real email addresses. To prevent sending mails to these users we added some logic to the application to replace the actual email address with preconfigured testing addresses. Now I'm thinking about the possibility to make the fake smtp server capable of forwarding emails to configured email addresses instead of the actual address.

Another interesting option may the possibility to configure a whitelist of addresses to which an email can be forwarded to prevent sending emails to real users cause of programming errors.

What do you think? If you would like we can maybe elaborate how the configuration should look like and I can implement the changes some day (I'm currently pretty busy with other projects).