Updated Tuesday, October 27, 2020
Gmail popularized plus addressing which is a simple rule that ignores everything after a plus sign in the local part of an email address.
For example, messages sent to email@example.com land into firstname.lastname@example.org.
This behavior is built into Migadu and no additional configuration is required for it. In addition, we will auto-create a folder with the label given after the plus sign (e.g. shopping) and sort the respective message there.
For an alternative to plus addressing, take a look at subdomain addressing.
Skipping Folder Auto-Creation
Creating folders may not be the behavior you expected. To just sort the message in Inbox, please create a Pattern Rewrite on the domain of your mailbox. For example, to prevent automatic folder creation and sorting for email@example.com, we would create the pattern rewrite rule below.
firstname.lastname@example.org => email@example.com
Such rewrite will drop the plus addressing for that mailbox and sort the message into Inbox.