How to use "email" in a sentence

She wrote their email addresses on a piece of paper and left it on the truck window.

Perhaps Aron had sent an email to one of his friends saying where he was going?

Aron had an email address - but what was it? She found his name, but had to answer a secret question to read his emails

He had found a list of email addresses for Aron's climbing friends

By early afternoon, Elliot had received an email from Steve Pratchett, the most important of Aron's climbing friends