Try instruction from microsoft Knowledgebase article below.
Send button is not visible on the toolbar when you send a document in Outlook 2003
http://support.microsoft.com/kb/817881/en-us
>I have a client with OL2003 attached in a SBS2000
> network. Now he complains when he clicks on NEW in
[quoted text clipped - 7 lines]
> not here either to add it. What do I do to get the
> button back in this toolbar?
jr - 24 Mar 2005 19:07 GMT
that doesn't work. my send button disappeared about a week ago. i have to
use the send option in the file pull down menu, and now that's gone
too.........
> Try instruction from microsoft Knowledgebase article below.
>
[quoted text clipped - 13 lines]
> > not here either to add it. What do I do to get the
> > button back in this toolbar?
Diane Poremsky [MVP] - 25 Mar 2005 00:20 GMT
does Alt+s work?

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Diane Poremsky [MVP - Outlook]
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> that doesn't work. my send button disappeared about a week ago. i have to
> use the send option in the file pull down menu, and now that's gone
[quoted text clipped - 18 lines]
>> > not here either to add it. What do I do to get the
>> > button back in this toolbar?