Somehow I doubt she's using a service hosted in Portugal...
I'll wager something in the USA and probably close to Ohio
Either way - as Bill said, while this forum is for Zimbra, a connection problem is going to be something you should contact your individual hosting provider for.
If you would like to enlighten us with the URL that you intend to browse too (ie
http://zimbra.domain.com or
http://zmail.domain.com or
http://webmail.domain.com or
http://mail.domain.com etc) then we'll be happy to hunt for some contact info for you.