Guide topic
Business email, DNS and deliverability guides
Guides to business email hosting, SMTP, receiving failures, spam placement, mailbox quota, SPF, DKIM, DMARC, MX records, DNS, server identity, and migrations.
Email & deliverability
Understand the system, not just the setting.
Business email depends on DNS, sending identity, authentication, reputation, and the hosting environment working together. This collection explains the pieces without suggesting one-size-fits-all DNS records that could break legitimate mail.
See hosting with email20 guides
Start with the problem you are solving.
MX record setup: how mail routing fits together
MX record setup tells other mail systems where to deliver messages for a domain. Learn priorities, hostnames, address records, provider instructions, and migration planning.
EmailBusiness email hosting: what a small business actually needs
Compare business email hosting by custom-domain mailboxes, IMAP/SMTP, webmail, storage, authentication, migration, backups, administration, and deliverability.
EmailEmail not sending: how to troubleshoot the delivery path
When email is not sending, separate client configuration, SMTP authentication, network ports, account restrictions, DNS, server acceptance, and recipient rejection.
EmailEmail not receiving: how to check MX, mailbox and filtering
If email is not receiving, check domain status, MX records, DNS, destination service, mailbox quota, aliases, spam filtering, and sender bounce messages in order.
EmailEmail goes to spam: what to check before blaming one record
Spam placement can involve SPF, DKIM, DMARC, server identity, IP and domain reputation, list quality, content, sending patterns, complaints, and recipient policy.
EmailSMTP authentication failed: how to read the failure
SMTP authentication failures usually involve credentials, username format, authentication policy, TLS, port choice, account status, or application-specific passwords.
EmailMailbox quota exceeded: how storage limits affect mail
A mailbox quota exceeded condition can reject new mail or prevent normal use. Learn what consumes quota, how to clean safely, and how client settings affect server storage.
Email & DNSMTA-STS setup: publish and test an HTTPS mail transport policy
Configure the MTA-STS DNS record, HTTPS policy file and certificate, then test policy mode and MX coverage before relying on strict transport enforcement.
Email & DNSTLS-RPT setup: receive reports about mail transport security failures
Publish a TLS reporting record, choose a report destination and interpret failures alongside MTA-STS or DANE so transport problems are visible.
Email & DNSBIMI readiness: what has to be in place before a brand logo can appear
Check DMARC enforcement, logo format, certificate requirements and mailbox-provider support before spending time on BIMI records that cannot be used yet.
Email & deliverabilityWeb hosting with email for beginners: how the pieces fit together
Learn how website hosting and domain email fit together, including mailboxes, MX records, DNS, SMTP, storage, backups, spam filtering, and when separate email hosting makes sense.
Email & deliverabilityBeginner guide to website email addresses and domain mail
Learn how addresses like hello@yourdomain.ca work, including domains, mailboxes, aliases, MX records, SMTP, spam filtering, storage, device setup, and website form delivery.
EmailEmail deliverability checklist for small businesses
A practical business email checklist covering sending domains, SPF, DKIM, DMARC, reverse DNS, reputation, forms, newsletters, bounce handling, and testing.
Email & DNSSPF, DKIM and DMARC explained for small businesses
Learn what SPF, DKIM and DMARC do, why business email uses all three, and how to approach authentication without guessing at DNS records.
DNSDNS records explained: A, AAAA, CNAME, MX and TXT
Understand the DNS records you are most likely to manage for a website and email, including A, AAAA, CNAME, MX and TXT records.
DNSNameservers vs DNS records: what is the difference?
Understand how authoritative nameservers, DNS zones, A records, MX records and registrar delegation fit together before changing a domain.
Web hostingWhat is cPanel, and do you actually need it?
A plain-language explanation of cPanel, WHM, common hosting tasks a control panel simplifies, and when managing a server directly makes more sense.
WordPressWordPress hosting checklist: what to verify before launch
A pre-launch WordPress checklist covering HTTPS, backups, updates, email delivery, DNS, security, performance, and recovery.
WordPressWordPress email problem: how to trace message delivery
When WordPress email fails, separate application generation, SMTP submission, DNS authentication, provider acceptance, and final mailbox delivery so testing does not stop at the contact form.
MigrationChange email hosting without downtime: migrate mail without losing messages
Change email hosting without downtime by preparing destination mailboxes first, copying historical mail, preserving aliases and authentication, switching MX carefully, and synchronizing messages delivered during the transition.