Add events yourself: Move the pointer over a date or time anywhere in a message until an outline appears around the information. Click the arrow, then click Add to Calendar (shown only if you have already set up an account in Calendar).
Add events for an Exchange account: In the banner at the top of the message containing the invitation, click Accept, Decline, or Maybe. If the event is being canceled, click OK. To view the invitation in Calendar, click the Calendar button in the banner.
Mail sends your reply to the event organizer and updates your calendar on the Exchange server and in Calendar, when it syncs with the server.
Have Mail add events for you: Choose Mail > Preferences, click General, then select Add invitations to Calendar automatically.
When you read messages, you can add email addresses and other contact information to the Contacts app.
Accept a Siri suggestion: Click Add (you can review the suggested information before adding it to Contacts). To decline the suggestion, click the Close button in the pass.
Add a pass to Wallet: Click Add to Wallet in the pass. If you already added the pass, but its content has since changed, an Update button is shown. You must be signed in to your iCloud account to add passes to Wallet.
Search for passes: Type “pass” in the Mail search field, then choose a suggestion from the Attachments category. You can also search for a pass type (such as coupon) or vendor.
Mail can detect web links in messages. To open a webpage, just click the link. To preview the webpage, move the pointer over the link, then click the arrow (or simply Delete old email addresses