Hithere
I bought pro myibidder online to bid on ebay but when I open it and tried to contact customer support throgh email it says the email I'd " my support @myibidder" is invalid.why???

I think this is because you put spaces in the email and forgot to add ".com" at the end.
Please check.

Do not re-type the email message, click on it instead so you don't have to type.