Apr 11, 2019 · When trying to upload an attachment of 30+ MB or a set of attachments totalling more than 30MB, I received a response with header 400, code "ErrorMessageSizeExceeded" and message "The message exceeds the maximum supported size.". If you choose to claim itemized deductions instead of the standard deduction, you would use Schedule A to list your deductions. Your itemized total is then subtracted from your taxable income. 1040 Schedule A is an optional attachment to Form 1040.
Yahoo Mail Help wrote:Currently, you can send up to three attachments totaling 10MB in any email message. And my ISP states pretty much the same RR Mail wrote: Road Runner e-mail services currently limit the total file size of all attachments in a single e-mail message to 10 MB.