6 min
Fix "exceeded the max defers and failures per hour" on cPanel
Why Exim discards a cPanel domain's outgoing mail with "max defers and failures per hour", how to find the bouncing recipients, and when to reset the block safely.
2026-10-07
8 min
Plesk email deliverability: SPF, DKIM, DMARC, and rDNS setup
Configure SPF, DKIM, DMARC, and reverse DNS on Plesk Obsidian so Gmail and Outlook accept your mail — including the DNS template defaults that quietly break third-party senders.
2026-10-01
6 min
Fix Dovecot 'Maximum number of connections' errors on cPanel
Why Dovecot rejects IMAP logins with "Maximum number of connections from user+IP exceeded" on cPanel, how to find the client causing it, and which WHM limits to raise safely.
2026-09-30
7 min
CVE-2026-67401: the cPanel EmailTrack flaw that turns mail access into root
A SQL injection in cPanel's EmailTrack feature lets any account with mail privileges write files as root. Fixed builds, affected versions, and how to check your fleet.
2026-09-15
5 min
Rspamd on cPanel: what's actually supported in 2026
cPanel & WHM has no native Rspamd integration — here's what the built-in stack actually is, why community Rspamd-on-Exim setups are risky, and when switching panels is the real answer.
2026-08-01
7 min
Tune Apache SpamAssassin on cPanel without losing mail
The WHM and cPanel settings that actually move the needle on inbound spam — threshold scoring, Spam Box vs auto-delete, SMTP-time rejection, and per-test scoring — without silently eating legitimate mail.
2026-07-18
8 min
cPanel greylisting: enable, tune, and stop mail delays
Turn on cPGreyList to cut inbound spam without sending legitimate mail to limbo — initial deferral, trusted hosts, SPF bypass, and a decision tree for the "email deferred" complaints.
2026-06-22
6 min
Email deliverability on cPanel: SPF, DKIM, DMARC, MTA-STS
A 2026 deliverability checklist for cPanel operators — reverse DNS, SPF, DKIM, DMARC enforcement, and MTA-STS, with the exact records and where cPanel still expects you to do it by hand.
2026-05-16