This howto for email alias, i search out
http://mirror.contribs.org/smeserver/contribs//rmitchell/smeserver/howto/virtual%20domain%20email%20aliases%20HOWTO%20for%20sme%20server.htmbut no word about "Pseudonyums"
In "e-smith-manager" -> Collaboration -> pseudonyms;
The server automatically creates an e-mail alias for each group. If you want to define an e-mail alias for a list of users, simply create a group and the list will automatically be maintained by the server.
What's different between "Howto" and "Pseudonyums"?
There are many accounts inside of Pseudonyums list, If following the Howto, is it any effect in "Pseudonyums" ?
when I add abc@dns1.com in Pseudonyums, the error shows :
The pseudonym should contain only lower-case letters, numbers, period, hyphen and underscore and should start with a lower-case letter or number. For example "sales", "john.holland", "123" and "email-administrator" are all valid pseudonyms, but "John Smith" and "Henry Miller" are not.