B4J Question How can POP receive Email only for specific (alias) email address?

Not sure...

You can however use DownloadMessageTop to get the mail headers and filter out the unwanted mails.

Thanks, that will work.

In case this can help someone else, here is how you can process only specific emails on your app.

I will use DownloadMessageTop with "false" as the last parameter which will leave the email on the server. If the "to" address of this download is the alias email address I'm looking for, I will re-execute DownloadMessage with "True" as the last parameter to get the complete message and delete the email from the server. The other emails with different email aliases not intended for my program will remain on the server because I did not delete them with DownloadMessageTop, so the appropriate email client will get to those eventually.

Sounds like a plan.