You would upload email addresses from an excel spreadsheet or simply by entering email addresses line after line or separated by comas.
You would easily send invitations to people who are outside linkedin contact list. There are two options. If you have an excel spread sheet with email list. You would simply click the button “Save as” and save it as .csv then you may upload it by clicking “upload contacts file”. You have another alternative as well. You may copy all the contacts the paste it to the text box “Invite by Individual Email” Button. Email addresses shall be pasted one after the other or separated by “commas”.
You would reach this page by clicking “Add connections” You would see Gmail, Outlook, Yahoo mail, Hotmail or any email. You would click any email and it will direct you to the page where you would add email list.