Why do messages with attachments take longer to send or receive?

Attachments are often large files, much larger than plain text email. Since there is more data to transmit, and more information for the email server computers to process, a message with an attachment generally takes longer to send and receive than a message without attachments.

Other questions about attachments:

• Introduction to attachments
• What is a file attachment?
• Can all Juno members send and receive attachments?
• How do I attach a file to an email message?
• Why can't some recipients receive attachments I send to them?
• How large can my attachments be?
• Why does an attachment look garbled or unreadable?
• How do I forward an attachment?
• Why can't I open some attachments?
• How do I turn a picture into an attachment?
• Why can't I print some attachments?
• How do I open or save an attachment?
• Why do messages with attachments take longer to send or receive?
• How do I check an attachment for viruses?
• I received a message referring to something called "MIME." What is MIME?
• Another Juno member can't open the attachment I sent them (This message is in MIME format).