Feature #1660: Migrate NethService to NethServer
Mail-server: name pseudonym after migrated account name
Though not present in accounts db as pseudonym records, email aliases such as <accountName>@<domainName> are always available in NethService/SME Server.
In NethServer, only
pseudonym records are expanded as email aliases.
While migrating accounts we must create
<accountName>@ pseudonyms to keep the old mail addresses valid.