Use a web browser to see whether you can access Internet sites. If you are on a local network, see if you can access intranet sites. For information about checking the status of your network connections, see Mac OS Help. Solution: Verify that Outlook is online. On the Outlook menu, make sure that Work Offline is.
Mail User Guide
There are various ways to work with attachments in email messages you receive.
View email attachments
In the Mail app on your Mac, select a message that includes attachments.
Look for the Attachment icon next to the sender’s name in the message list.
In the message, do one of the following:
Open an attachment in an app: Double-click the attachment.
Preview an attachment without opening it: Select the attachment, then press the Space bar, or force click the attachment.
Some attachments—like images or one-page PDF documents—are displayed directly in the message. If you’d rather view the attachment as an icon, Control-click it, then choose View as Icon from the shortcut menu. To display the attachment again, Control-click it, then choose View in Place.
Save email attachments
In the Mail app on your Mac, move the pointer over the header of a message.
Click the Attach button that appears, click the name of an attachment or choose Save All, then choose a location.
You can also select a message, then choose File > Save Attachments. Or drag an attachment from the message to the desktop to save it there.
Email attachments are saved in the Downloads folder, available in the Dock. To specify a different location, choose Mail > Preferences, click General, then select a folder.
Delete email attachments
In the Mail app on your Mac, select a message that includes one or more attachments.
Choose Message > Remove Attachments.
The message remains in the mailbox and is annotated to indicate that all attachments were manually removed. For IMAP accounts, attachments are also deleted from the mail server and can’t be retrieved.
When you delete a message that includes an attachment, the attachment is deleted too. To change this setting, choose Mail > Preferences, click General, click the “Remove unedited downloads” pop-up menu, then choose an option. Mail doesn’t delete attachments that you have saved.
Mail automatically downloads attachments you receive based on the download option you set in Account Information preferences in Mail.
If you send or forward images or PDF documents you receive to other people, you can mark up the attachments with comments, drawings, or a signature before you send them.