"outlook user" <outlookuser@discussions.microsoft.com> wrote in message
news:76DF29E8-B271-4F8D-9A50-198DE2FDB49E@microsoft.com...
> Im not using exchange server, and yes my recipients are outside my
> network.
> i´ve donde this before with no problem but latelly i´ve been having this
> problem with some specific email adresses.
Are those specific addresses contacts in your Contacts folder? If so, open
one of them and double-click the email address. You should see an "Internet
format" drop-down at the bottom. Make sure it's set to "Let Outlook decide
the best sending format".
Brian Tillman [MVP-Outlook]