Email & webmail
Mailboxes, webmail, forwarders, spam filters and email delivery.
37 guides · page 1 of 2
Can't log in to webmail? Fix cPanel webmail login problems
Solve common cPanel webmail login problems: wrong username format, forgotten mailbox password, blocked port 2096, IP blocks after failed attempts and session errors.
Common email bounce errors explained (550, 552, 554, 421) on cPanel
Understand the bounce messages you receive from cPanel mail servers: user unknown, mailbox full, SPF and DMARC failures, blocklists, rate limits and temporary deferrals.
Configure the cPanel mail server (Dovecot) in WHM (root guide)
Tune Dovecot in WHM Mailserver Configuration as root: IMAP/POP3 protocols, connections per IP, TLS settings and mailbox options, and fix "too many connections" errors.
cPanel email server settings: IMAP, POP3 and SMTP ports explained
A reference for cPanel email settings: incoming and outgoing server names, IMAP 993, POP3 995, SMTP 465 and 587, SSL/TLS options, and IMAP versus POP3.
Create and manage mailing lists in cPanel (Mailman)
Create a Mailman mailing list in cPanel, add members, choose announcement or discussion mode, moderate posts and understand sending limits.
Create email filters in cPanel (per account and global filters)
Use cPanel Email Filters and Global Email Filters to sort, forward, discard or bounce messages by subject, sender or spam score, and test each rule before saving.
DMARC on cPanel: read reports and move from p=none to reject
Go beyond a basic DMARC record: receive and read aggregate reports, find who sends mail as your domain, and tighten the policy step by step from none to quarantine and reject.
Email not sending from cPanel? How to find and fix the cause
Work out why mail will not send from your cPanel mailbox or website: SMTP settings, ports, authentication, sending limits, blocklists and PHP mail from WordPress.
Enable greylisting in WHM to cut spam (root guide)
Turn on cPanel greylisting in WHM as root to reject first-time senders temporarily, set delay and expiry times, whitelist trusted senders and avoid delaying important mail.
Encrypt email with GPG keys in cPanel (Encryption tool)
Generate or import GnuPG/OpenPGP keys in cPanel's Encryption tool, share your public key, and use encrypted email in Roundcube or Thunderbird for sensitive messages.
Exim Configuration Manager in WHM: essential mail server settings (root)
Configure the Exim mail server on cPanel & WHM as root: RBL blocklists, SpamAssassin thresholds, sender verification, TLS, smarthost relays and safe defaults.
Fix a full mailbox in cPanel: Email Disk Usage and quotas
Find out what fills a cPanel mailbox, clean old mail by folder and age with Email Disk Usage, raise the mailbox quota and stop "mailbox full" bounces.
Handle spam in Roundcube: Junk folder, whitelist and blacklist senders
Deal with spam from webmail: find mail in the Spam folder, mark messages as spam or not spam, and whitelist or blacklist senders in cPanel Spam Filters so it sticks.
Hourly email sending limits on cPanel hosting explained
Why cPanel hosting limits how many emails a domain can send per hour, what happens when you hit the limit, how to see queued mail and how to send newsletters properly.
How email hosting works: SMTP, IMAP, POP3, MX, SPF, DKIM and DMARC
Follow an email from sender to inbox: SMTP and MX records, IMAP vs POP3, and how SPF, DKIM and DMARC prove your mail is genuine so it lands in the inbox, not spam.
How to use Roundcube webmail on cPanel hosting
Log in to webmail on port 2096, read, write and organise email in Roundcube, manage folders and attachments, and work safely from any browser.
Import and export contacts in Roundcube webmail (vCard and CSV)
Move your address book into or out of Roundcube webmail with vCard or CSV files, create contact groups, and sync contacts with phones using CardDAV in cPanel.
Manage the Exim mail queue in WHM (Mail Queue Manager, root)
Inspect, deliver and delete messages stuck in the Exim queue on your cPanel server with WHM Mail Queue Manager and command-line tools, and find the source of spam.
Move email from another provider to cPanel (IMAP migration)
Migrate existing mailboxes to MdmHost cPanel email without losing messages: create accounts, copy mail over IMAP with an email app, switch MX records and reconnect devices.
One SPF record for several mail services (and the 10-lookup limit)
Combine cPanel, Google Workspace, Microsoft 365, newsletter and CRM senders into a single valid SPF record, stay under the 10 DNS lookup limit and avoid common SPF errors.
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