Hello @SALLYD6 ,
The size of your emails isn't what would result in contacts being suspended. It occurs when our system receives multiple non-existent bounce backs from the contact's network, whether it was you or another customer of ours that was sending to them.
I'd recommend reading through our article on suspended bounces to understand how they happen, and what you can do to correct it. Ultimately, if you end up needing an administrative unsuspension, you'll want to reach out to our general support.
However if you're needing more than 10 addresses unsuspended at a time, then we strongly recommend you call our Deliverability team for the unsuspension. They'll want to investigate why so many valid email addresses would be getting bounced back to us as non-existent.
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