A mail server is software that manages the sending, receiving, and storage of emails. It typically uses SMTP to send outgoing messages, while POP3 or IMAP handle incoming mail, ensuring emails reach the right inbox safely.
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Mail Server FAQs
Answers to common questions about mail servers and email delivery
What does a mail server do?
Why are MX records important?
MX (Mail Exchange) records in DNS indicate which server is responsible for receiving email for your domain. Correctly configured MX records make sure that messages are properly delivered to your mail server.
Which protocols and ports are used by mail servers?
Outgoing emails use SMTP over ports 25, 587, or 465. Incoming mail is managed through POP3 (ports 110/995) or IMAP (ports 143/993). Encrypted versions (SMTPS, POP3S, IMAPS) secure your data during transfer.
How can I keep my mail server secure?
Protect your mail server with TLS encryption, strong authentication, firewall rules, and spam filtering tools. Adding SPF, DKIM, and DMARC records also helps safeguard your domain against spoofing and phishing.
What’s the difference between managed and self-hosted mail servers?
A self-hosted server gives you complete control but requires you to handle maintenance and security. With managed hosting, the provider handles updates, backups, and monitoring, offering a hands-off experience.
How do I improve my email deliverability?
To boost deliverability, use proper reverse DNS, keep a good IP reputation, configure SPF, DKIM, and DMARC, update your mail server regularly, and avoid sending unsolicited bulk emails.