One function would be great: Assuming you have customers with a large number of addresses (e.g. municipalities or large corporations).

Example Mustermann AG group with the mail domain: @mustermann-ag.de

Here it would be great if a check could be made during registration: if further registrations with the mail domain @mustermann-ag.de come into Shopware, a message could appear: “There is already at least one customer account with the e-mail domain @mustermann-ag.de. Are you sure that another customer account is required for this company? If necessary, contact the user who has already created the customer account to place an order.”

It is of course important here that mail domains from general hosters such as @gmx.de, @gmx.com, @yahoo.de, @yahoo.com, @outlook.de, @outlook.com etc. are not validated.

Why: we have to deal with duplicates. Every newly registered customer receives a new customer number. In some cases, we also store customer-specific prices. Of course, this only works if a new customer number is not created for each customer and a new group number is created above it (we call this a group).