How to fix Cannot Send This Item in outlook

I'm having an issue with my outlook when I was about to send an email to a client. After I click SEND, it shows an error "cannot send this item". I was upset because the error says cannot send the item, But not showing what cause the error or hints on how to solve it.

As I search the net I found out two common reasons for this error.

Reason 1 - Maybe you use HTML in your email message - Change your email message from HTML to rich text or just a plain text. Sometimes copying your message and compose a new message in paste it there solves the problem.

Reason 2 - Oversized logo/image signature - If you have a logo signature in your message then it is possible the reason. Maybe your image is too large for a signature. Resize it to a smaller one or just use a text signature.

In my case it is the reason number 1, I just clear the formatting to remove HTML and use plain text only. Then I can send my email without getting the "cannot send this item error."

If you experience this error message and you have other solution please comment below and let helps other.