SB> If I send a mail to bortzmeyer@foo.bar when the main domain is SB> dot.bar and I have in the virtusertable: SB> bortzmeyer@foo.bar bortzmeyer SB> the mail is received with a header: SB> To: bortzmeyer@dot.bar SB> which is not what the customer wants. What else do you have in your .mc ? Masquerading options maybe? Out of the box with no other options sendmail should leave the header to alone. cheers, BM