I sent a message a few hours ago and my sending box is blocked probably due to too heavy files in attachement.

I can't  stop it and get back my original message & files .

I cannot send new mails that will be cumulated in the sending box .

How can I stop that and get back my original  text mail ?

I sent a message a few hours ago and my sending box is blocked probably due to too heavy files in attachement.

I can't  stop it and get back my original message & files .

I cannot send new mails that will be cumulated in the sending box .

How can I stop that and get back my original  text mail ?