Email Attachment Size Limit
Our size limits are consistent with most other mail servers. This means that even if we had no limits on our side, large emails would still be bounced back by the recipient’s server.
Rather than sending large attachments, we recommend using a service such as www.yousendit.com instead. It’s free for files up to 100MB, and it’s much more reliable than trying to get large emails through multiple servers. You can upload the file to that site, and then when you send it, the recipient will get a download link. This eliminates the possibility of hitting email file size limits at any point along the way.