What shell does a Linux Administrator assign to a POP3 mail-only account?

The /bin/false shell is given a POP3 mail-only account by a Linux Administrator. Assigning a bash shell to a POP3 mail-only account, on the other hand, grants the user login access, which is often avoided. You may also use the /bin/nologin shell. When we don’t want to provide the user shell access, we offer them this shell. The user is unable to access the shell, and shell login on the server is rejected, as in Telnet. Its primary purpose is to ensure the safety of the shells.
POP3 is mostly used to download mail-to-mail applications. This account is given to the /bin/false shell or the /bin/nologin shell for illicit email downloads on the shell. Both shells perform the same function of denying the user’s login to the shell.
The primary difference between these two shells is that when a user signs in, the fake shell displays the wrong code and any odd coding, whilst the nologin shell just informs us that no such account exists. As a result, the nologin shell is often used in Linux.