If you add attachments to supplement the body of your work, be
certain to include a table of contents so readers can find those sections of
interest to them and skip the rest. Even if all the attachments are skipped,
simply including them adds weight—literally and figuratively—to your
communications.
Attaching documents to E-mails, on the other hand, needs to be carefully
considered. Many companies have security programs that flag
E-mails with attachments. Worries about viruses and policies prohibiting
the circulation of jokes and cartoons have resulted in many organizations
stopping E-mails with attachments from reaching the intended
party without first going to a security administrator. Make sure your readers
know the attachment is relevant and expected.