User sent e-mail in rich format,but on the other side e-mail was received in plain format.Why?

Outlook 2000 Workgroup
User created e-mail in Rich format which was sent outside client (not in GAB) and client received that e-mail in plain format.Also the same e-mail was sent to other users within corporation and outside and they received it in Rich Format
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Greetings, vnmikhal !

If the recipient is not using Outlook, received email could be Plain Text format with the rich formatting attached as attachment.  Outlook has special formating that some email clients cannot read.

Best wishes!

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