Why don't all contacts in a CSV file have e-mail addresses?

You won't be able to find the contacts e-mail address in a CSV file in the following cases:

1. You extracted 2nd or 3rd+ contact. LinkedIn does not allow you to view their email addresses.
2. This contact is already your 1st connection, but it was extracted when it was 2nd or 3rd+ contact.
3. You've just collected your 1st connections and downloaded them from the "Queue" sub-list without processing them.

1. You extracted 2nd or 3rd+ contact. LinkedIn does not allow you to view their email addresses.

Linked Helper 2 scrapes all available data when processing contacts profile with any action that visits the contacts profile. E-mails are unavailable on the profile pages of 2nd and 3rd level contacts, so Linked Helper 2 won't be able to scrape them.

However, there is a way to get e-mails from your 2nd and 3rd level contacts by using Snow.io: How to get emails of your 2nd and 3rd connections in LinkedIn

 

2. This contact is already your 1st connection, but it was extracted when it was 2nd or 3rd+ contact. 

After the contact becomes your 1st connections, you can scrape their e-mails address from the profile page. The most convenient way to do that is to use "Visit and extract profiles" or "Message to 1st connections" actions.

However, if you'll put Visit and extract profiles" Action right after "Invite 2nd and 3rd level contacts" then Linked Helper won't be able to extract contacts e-mails because it will be scraping the profile's contacts with "Visit and extract contacts" Action the next moment after the invitation was sent, which means most of the invitees won't be able to accept the invite and become your 1st-level connections.

Here is how you should NOT organize your workflow:

You need to place "Visit and extract profiles" or "Message to 1st connections" after "Filter contacts out of my network", so Linked Helper 2 could scrape profiles of only 1st level connections.

Here is how your workflow SHOULD look like:

 

3. You've just collected your 1st connections and downloaded them from the "Queue" sub-list without processing them.

To scrape e-mail from your 1st connections, Linked Helper needs to process them with any Action that visits profiles pages, for example, "Visit and extract profiles" or "Message to 1st connections" actions. After Linked Helper has processed them, you can download extracted profiles from the "Successful" sub-list of the Action: