For example, if you are working on a homework assignment or other project with someone you could attach a draft of your work to an e-mail so that your partner could review the work, edit it and then send it back to you. Similarly, one can attach files such as spread sheets, Web pages, zipped files , database files, etc. An advantage to sending a file as an attachment instead of sending a fax is that the person at the other end who receives the file can edit what is sent and then send back the changes. A fax on the other hand is a picture of the page and individual words or sentences can't be edited easily without retyping the file. An advantage to an attachment over copying and pasting text into an e-mail is that all of the formatting such as bold, underline, tabs, tables, etc. can be preserved.
Mail limit the size of e-mails and attachments.
Problems that may occur In order for someone read an attachment that someone sends, it is necessary to have software that can read the document. If an attachment is created with the WordPerfect word processing program, then the person at the other end will need either the same program, or a program that can read WordPerfect documents. Microsoft Word, for example, is able to read the files that are created in most other word processing software. Sender and receiver do not have compatible software. This format will likely be able to be read and maintains most basic formatting.