E-mail Phishing
In short: E-mail phishing is the classic form of phishing: mass-sent mails with a forged sender.
In more detail: The attackers send the same message to very many recipients and expect a small success rate. The mails lead to pages that imitate real login forms.
In Depth
Difference to spear phishing
E-mail phishing is broadly distributed and impersonal. Spear phishing is tailored to a specific person or company.
Protection
Type the address in the browser yourself, use bookmarks, enable MFA, training and a reporting channel in the company.
See also: Phishing, Phishing Mails, Spear Phishing