Email & webmail
Mailboxes, webmail, forwarders, spam filters and email delivery.
67 guides · page 4 of 4
Tune Dovecot: connection limits, quotas, indexes and performance
Practical Dovecot tuning for busy mail servers: per-user and per-IP connection limits, process settings, mailbox quotas with warnings, index and fsync options, and brute-force protection.
Use BoxTrapper in cPanel to stop spam with sender verification
Enable BoxTrapper for a mailbox, build whitelists and blacklists, review the queue, and decide when challenge-response filtering helps or hurts your email.
Use Track Delivery in cPanel to find missing or bounced emails
Search cPanel Track Delivery to see whether an email was accepted, delivered, deferred, rejected as spam or bounced, and read the delivery report to fix the cause.
Webmail on cPanel servers: enable Roundcube and set limits in WHM (root)
Configure webmail for all cPanel accounts as root: enable Roundcube, set the default webmail app, attachment and upload limits, Dovecot settings and proxy subdomains.
When an employee leaves: forward, archive and delete their cPanel mailbox
A safe offboarding routine for a departing employee's cPanel email: block logins, keep receiving mail via a forwarder, archive old mail and delete the mailbox later.
Why forwarded email fails SPF and DMARC: SRS and ARC explained
Why forwarding breaks SPF and sometimes DKIM, how Sender Rewriting Scheme (SRS) and ARC fix it, how to enable SRS on cPanel and Postfix, and safer alternatives to forwarding.
Why your emails go to spam (and how to fix it on cPanel hosting)
A checklist to stop emails from your cPanel domain landing in Gmail or Outlook spam: authentication, From addresses, content, blocklists, PHP mail and warm-up.
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