solidpop3d どうよ? オレは vpopmail 使ったことないので、その点は分からんけど、 VIRTUALS に - IP based virtual hosting: read spop3d(5).conf manual for details. - non-IP based virtual hosting: user is logged as username@host.name.com or username%host.name.com if POP3 client doesn't allow to use '@' in username. host.name.com is called "virtual domain name".