I’m sending an email from mailinabox to a known bad address at a third party (part of testing) and I’m expecting to receive a postmaster bounce from mailinabox telling me that the message failed with a 550. I’m not getting any notification that the message failed from mailinabox though. Should I get a warning about this or have I misunderstood how it works?
Mail client: Thunderbird
Mail server: Mailinabox 0.29