Help please, I have tried several times to send bulk messages, but each time they don’t go and I get the message as follows, error 6.6.0 can’t send, it says due to something wrong with the body of the message.
I need to send messages to all my club members.
Regards
Barbara
Barbara, did you resolve this? I am also getting it 
Seems to me as if yahoo refuses the email.
Is there something special in the body of your mail? An image with invalid format, an attachment, something with big file size?
I am also getting this error. This is a Yahoo! email account. I tried sending the email as plain text but still doesn’t work.
Did anyone find any solution?
[SMTP] Cannot send message (Sending email "Application for Design Coordinator/Architect Position" failed with error: Email body not accepted due to the following reason:
"6.6.0 Error sending message for delivery.
")
Apparently, the problem is from Yahoo! mail servers. I tried sending via Yahoo! webmail and this popped up. 
