> [log in to unmask]

I've seen address like [log in to unmask]
or "[log in to unmask]"@ns.urbe.it ie redirecting their mail to an
incoming gateway ...

My guess is someone is confused between "mailhost" and "mailid" or
simply entered wrong info while configuring their mailer ... I say that
since "enet.urbe.it" seems like a "plausible" sub-domain ... I've seen
few "enet" type of subdomains using gateways ...

HTH,

PS Maybe delete it (the user will re-sub) ?
or query the list for *@*urbe.it maybe somebody screwed up while they
tried to change the address (changing their user account instead) ?
--
Eric Paul-Hus, BLUES-L