Let's Encrypt Email Format

The most common Let's Encrypt email format is [first] (ex. jane@letsencrypt.org), which is being used by 59.2% of Let's Encrypt work email addresses.

Other common Let's Encrypt email patterns are [first_initial][last] (ex. jdoe@letsencrypt.org) and [first].[last] (ex. jane.doe@letsencrypt.org). In all, Let's Encrypt uses 4 work email formats.