Glossary
POP3
Post Office Protocol version 3: a way for a mail client to download messages from a server.
ValidReach Team · Updated 2026-10-26
In practice
By default it moves mail to one device and may delete it from the server, which suits a single computer. Most people today use IMAP so that all devices stay in sync. Secure connections use port 995.
Verification and sending
Not related to verification, which uses SMTP.