Email & webmail
Mailboxes, webmail, forwarders, spam filters and email delivery.
67 guides · page 3 of 4
Restore deleted emails and mailboxes from JetBackup 5
Bring back deleted email messages, folders or a whole mailbox from MdmHost's daily JetBackup 5 backups in cPanel, without overwriting newer mail.
Roundcube filters and out-of-office replies (Managesieve)
Create mail filters and out-of-office vacation replies directly in Roundcube webmail with Managesieve, including date ranges, folder rules and forwarding.
Roundcube settings: signature, identities, display and composing options
Personalise Roundcube webmail: add an HTML email signature, set up identities and reply-to addresses, change language, time zone, layout and composing defaults.
Secure a cPanel email account: passwords, suspended logins and compromised mailboxes
Change a mailbox password in cPanel, suspend logins or incoming mail, and what to do when an email account is hacked and sending spam.
Sending large files by email: attachment limits and better alternatives
Why large attachments fail from cPanel email and webmail, the size limits on both sides, and better ways to send big files: download links from your hosting or cloud storage.
Set up cPanel email in Apple Mail on macOS
Add a cPanel mailbox to Apple Mail on Mac with the automatic profile or manual IMAP and SMTP settings, map Sent and Trash folders and fix connection warnings.
Set up cPanel email in Mozilla Thunderbird
Add a cPanel mailbox to Thunderbird on Windows, macOS or Linux with IMAP 993 and SMTP 465, check folder and deletion settings, and fix certificate and login errors.
Set up cPanel email in Outlook for Windows (new Outlook and classic)
Add a cPanel mailbox to new Outlook and classic Outlook on Windows with IMAP, using exact server names and ports, and fix password prompts and sending errors.
Set up cPanel email on Android with the Gmail app
Add your MdmHost cPanel mailbox to the Gmail app on Android (or Samsung Email) with IMAP 993 and SMTP 465 settings, and fix sync and authentication errors.
Set up cPanel email on iPhone and iPad (iOS Mail)
Add your MdmHost cPanel mailbox to the iPhone or iPad Mail app with the automatic profile or manual IMAP settings, and fix password and sending errors.
Set up Dovecot as an IMAP server with Postfix on Linux
Install Dovecot, store mail in Maildir, require TLS on IMAP 993, connect it to Postfix for local delivery (LMTP) and SMTP authentication, and test logins from a mail app.
Set up MTA-STS and TLS-RPT to secure inbound email
How MTA-STS forces encrypted delivery to your mail servers, how TLS-RPT reports problems, and how to publish the DNS records and HTTPS policy file step by step.
Set up Postfix as a send-only SMTP server on Linux
Configure Postfix to send system and application email from a VPS without accepting inbound mail, with correct hostname, PTR, SPF and DKIM, or relay through an external SMTP provider.
Set up Rspamd spam filtering and DKIM signing with Postfix
Install Rspamd with Redis, connect it to Postfix as a milter, set reject and junk thresholds, enable DKIM signing, use the web UI and train it with Dovecot.
Shared team inboxes on cPanel: info@ and sales@ for several people
Three ways to let a team handle info@ or sales@ on cPanel email: forwarders to each person, one shared IMAP mailbox, or a helpdesk, with the pros, cons and setup of each.
SMTP relays and smarthosts explained: when and how to use one
What an SMTP relay or smarthost is, why servers send through one, ports 25, 465 and 587, authentication, SPF and DKIM for relays, and how to configure Exim or Postfix to use one.
SMTP reply codes explained: 2xx, 4xx and 5xx email errors
How to read SMTP reply codes and enhanced status codes in bounces and logs, what common 421, 450, 550, 552 and 554 errors mean, and what to do about each one.
SPF, DKIM and DMARC explained: email authentication for domain owners
What SPF, DKIM and DMARC do, how they work together to stop spoofing and improve inbox placement, what the DNS records look like and how to roll out DMARC safely.
Stop outgoing spam from your mail server with rate limits
How hacked mailboxes and scripts send spam from servers, how to detect it in logs and queues, and how to limit outgoing mail per user and per domain on Postfix, Exim and cPanel.
Sync calendars and contacts with cPanel (CalDAV and CardDAV)
Use the calendar and contacts server included with cPanel email: find the CalDAV and CardDAV URLs, connect iPhone, Android, Thunderbird and macOS, and share calendars.
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