Companies asking customers to send sensitive information by email

This annoys me so much! They make sure they send you documents via a secure link, but ask you to attach documents like passports to an email.

I tried sending insurance document to Hastings Insurance via 2 different online encrypted links, then via a password protected 7zip file which the customer service agent couldn't open because of security policies. They have no way of uploading a file securely just like most other companies!