Beginner · 7 lessons
Email Hosting
Email hosting delivers professional email using your domain (you@company.com). It relies on SMTP to send, IMAP/POP3 to receive, and DNS records (MX, SPF, DKIM, DMARC) for deliverability and security against spoofing.
Key Concepts
Key Takeaways
- ✓ Professional email uses your domain — builds trust vs free Gmail.
- ✓ MX records tell the internet which server receives your email.
- ✓ SPF + DKIM + DMARC authenticate emails and prevent spoofing.
- ✓ Use IMAP for multi-device sync; POP3 downloads and removes from server.
Lessons in This Topic
How Email Works
The journey from compose to inbox.
You compose in Gmail/Outlook → SMTP sends to recipient's mail server → server checks MX record for domain → delivers to mailbox → recipient's client fetches via IMAP/POP3. Multiple servers and spam filters sit in between. Delivery takes seconds to minutes.
SMTP, IMAP & POP3 Protocols
Send, sync, and receive email.
SMTP (port 587/465) sends outgoing mail. IMAP (port 993) syncs mail across devices — changes on phone reflect on laptop. POP3 (port 995) downloads mail to one device and often deletes from server. Always prefer IMAP for business use.
MX Records & Mail Server Setup
Point your domain to the mail server.
MX record format: priority + mail server hostname. Lower priority number = preferred server. Example: `10 mail.yourdomain.com`. Mail server hostname needs A record pointing to mail server IP. Allow 24-48 hours for DNS propagation after changes.
SPF, DKIM & DMARC Authentication
Prevent email spoofing and improve deliverability.
SPF TXT record lists authorized sending servers. DKIM adds cryptographic signature to email headers. DMARC tells receivers what to do with failed auth (none/quarantine/reject). All three required for reliable inbox delivery in 2026. Check with mail-tester.com.
Email Deliverability Best Practices
Stay out of the spam folder.
Warm up new IP addresses gradually. Maintain clean mailing lists (remove bounces). Avoid spam trigger words. Include unsubscribe links. Monitor sender reputation with Google Postmaster Tools. Dedicated IP for high-volume senders. Never buy email lists.
Webmail vs Desktop Email Clients
Access email from browser or app.
Webmail (Roundcube, Horde) works in any browser — no setup needed. Desktop clients (Outlook, Thunderbird, Apple Mail) offer offline access and advanced features. Mobile apps use IMAP for sync. Most hosting includes webmail free with email hosting plans.