"For example" as sentence fragment, and without comma, p.61

Rev. 788
Ch. 3, § "Setting up a POP connection", p. 61 (PDF p. 63)
Types: grammar

Manual has:
In the Server field, enter the Internet name of your mail server. For example, pop.example.com. In the Username field, enter the username that you use to log into your email system, for example joe.x.user, or <email address hidden>.

Here, "for example" is the common denominator for two problems, first appearing in a sentence fragment, then not being followed by a comma. "Internet name" might be better as "address" too.

In the Server field, enter the address of your mail server, for example, pop.example.com. In the Username field, enter the username you use to log into your email system, for example, joe.x.user, or <email address hidden>.