IMAP, which stands for Internet Message Access Protocol, is the standard language email apps use to read mail that lives on a server. Your messages stay on the server, and every device you own shows the same up-to-date inbox.
Think of your inbox as a shared filing cabinet in a central office rather than a stack of letters in your bag. Whether you open a drawer from your phone, your laptop or a browser, you are looking at the same cabinet. Read an email on one device and it shows as read everywhere, because nothing was copied away. This server-first design is why IMAP suits people who check mail from several places. It also makes IMAP handy for automation: a tool like n8n can connect over IMAP, watch for a specific message, and kick off a workflow, much like an API connection but for your mailbox.
The trade-off is that your mail depends on the server being reachable, and your stored messages count toward your mailbox quota. For most businesses that is a fair deal for staying in sync.
It helps to know where IMAP stops. It only reads and organises mail; sending is a separate protocol called SMTP, so a full setup usually wires both. And because IMAP polls a mailbox rather than getting pushed to like a webhook, an automation that watches an inbox checks every minute or two instead of reacting the instant a mail lands. Modern logins also use an app password or OAuth rather than your everyday password, which keeps the connection safer.
At TopDevs we use IMAP connections to plug a client’s inbox into automated flows, so incoming orders, invoices or support requests can be processed without anyone copying them by hand.
