Set Up Webmail on iPhone

Webmail is the browser page; an iPhone needs an account — so "setting up webmail on iPhone" means adding that mailbox to Apple Mail as an IMAP account, where mail stays on the server and the phone keeps a synced copy. The tap path on a current iPhone is Settings → Apps → Mail → Mail Accounts → Add Account → Other.

• Webmail in Safari: nothing to configure, works on any borrowed device — but no notifications, no offline reading, no address-book sync.
• IMAP in the Mail app: syncs every folder, sends natively, and survives a phone reset because the mail lives on the server.
• POP3: downloads the mailbox to one device and can remove it from the server — skip it for a business email address you also open on a laptop. The POP3 vs IMAP comparison covers the trade-off.

Both routes use the same mailbox and password: if webmail works and the phone does not, the fault is in the account settings on the phone, not in the mailbox.

The whole add takes about two minutes: Settings → Apps → Mail → Mail Accounts → Add Account → Other → Add Mail Account, then IMAP with the four values from the table above. Older guides send you to "Mail, Contacts, Calendars", which no longer exists on a current iPhone.

1. Open Settings, tap Apps, tap Mail, then Mail Accounts.
2. Tap Add Account, scroll past the big provider list, and tap Other.
3. Tap Add Mail Account and fill Name, Email, Password and a description such as Work.
4. Tap Next and choose IMAP on the following screen — not POP.
5. Incoming Mail Server: mail.yourdomain.com, your full address, the mailbox password.
6. Outgoing Mail Server: the same host, same username, same password — a blank outgoing username is the most common reason sending fails later.
7. Tap Next, then Save, and accept the certificate prompt if iOS shows one.

It worked when the inbox fills and a message you send to yourself arrives in Mail and shows in webmail within about a minute. If only one direction works, read the sending section below.

Incoming and outgoing are separate logins: a mailbox can receive for years on a blank SMTP username until the server starts refusing unauthenticated mail. The fix is to give the outgoing server its own credentials.

1. Open Settings → Apps → Mail → Mail Accounts, tap the account, tap Account, then the outgoing server (SMTP).
2. Fill in the username and password — the same full address and mailbox password as incoming.
3. Confirm the port: 465 with SSL if your host publishes it; set Server Port explicitly rather than leaving whatever was auto-filled.
4. Test on mobile data if sending fails only on office Wi-Fi — a network that blocks 465 or 587 lets mail arrive and never lets it leave. That is a firewall question for the network owner, not a mailbox fault.

Use IMAP for a cPanel domain mailbox; use the Microsoft Exchange account type only when the mailbox actually lives on Microsoft 365 or another Exchange server. Exchange ActiveSync adds push delivery plus calendar and contacts sync — the two things plain IMAP cannot do — but it only works against a server that speaks it. If your mail runs on Microsoft 365, add the account from the same Add Account screen and choose the Microsoft Exchange option, signing in with the mailbox address and password; the server settings fill themselves. A cPanel mailbox on that screen will not verify, and that is the signal you belong on the IMAP path above.