A computer file that rides along with an email message. Attachments are widely ... It must be encoded into a text-only format in order to pass through all the servers in the Internet mail system ...

How to Import Excel Data Into Outlook Calendar (+ Free Template) Your email has been sent The big ... By saving the source data in the comma-delimited format and then mapping that data to Outlook ...

Please see "Email Attachment Formats Explained" in TidBITS 515 and "Email Attachments: Who Does What" in TidBITS 516 for details on each of these formats and how different email programs support them.