Security & Abuse
Break-Glass Access to Stored Email: What Good Controls Look Like
Write who, when, and how. Curiosity is not a control.
email break glass access
Read the guideMailerZ Blog
Domain email guides you can operate.
Long-form setup and decision writing for custom-domain forwarding, Gmail send-as without Workspace, aliases, DNS, and authenticated SMTP. One job per article. No invented product claims.
25 of 315 articles25 articles per page. New posts join this catalog as they publish.
Competitor Comparisons
MailerZ vs Addy.io: Custom Domain Routing Compared
Pick the job. Brand roles on your zone. Masks for throwaways. Do not dual-publish a bake-off.
mailerz vs addy io
Read the guideSMTP Send-as
How to Send From Your Domain Without Hosting a Mailbox
Keep Gmail as the store. Prove inbound. Upgrade off Free. Copy the dashboard SMTP pair. The received From must be the alias.
send email from domain without mailbox
Read the guideBuyer Guides & Decision
Best Email Forwarding Service With SMTP Send-As
Inbound-only forwarders fail the reply. Random SMTP fails the receive. Pick one operator, delete leftover MX, and test both directions.
email forwarding service with smtp
Read the guideDeveloper & Website SMTP
How to Test SMTP From a VPS Without Sending Bulk Email
One 250. Close 25. Delete the script. A for-loop is bulk.
test smtp from vps
Read the guideAgency & Multi-domain
How to Avoid Shared SMTP Credentials Across Clients
One user per zone. Rotate on offboard. A shared .env is every client’s incident.
smtp credentials per client
Read the guidePersonal Domains
How to Keep One Inbox While Owning Multiple Personal Domains
multiple personal domains one inbox: one MX set, leftover hosts gone, Gmail or Outlook as the store.
multiple personal domains one inbox
Read the guideBuyer Guides & Decision
Custom Domain Email Buyer Guide for Agencies
One owner per client zone. Count aliases, not seats, for printed roles.
custom domain email for agencies
Read the guideDeveloper & Website SMTP
How to Use SMTP Credentials Safely in .env Files
Secrets are not code. Copy the dashboard. Gitignore .env.
smtp credentials env security
Read the guideMigrations
How to Migrate a Catch-All Domain Without Creating a Spam Problem
Catch-all FORWARD on cutover day is how you import a decade of guessed names. HOLD. Name. Then decide.
migrate catch all domain
Read the guideCost & Workspace Alternatives
How Agencies Can Reduce Per-Mailbox Costs Across Client Domains
agency email cost reduction: one MX set, leftover hosts gone, Gmail or Outlook as the store.
agency email cost reduction
Read the guideCompetitor Comparisons
MailerZ vs Proton Mail: Delivery Layer vs Privacy Mailbox
mailerz vs proton mail: one MX set, leftover hosts gone, Gmail or Outlook as the store.
mailerz vs proton mail
Read the guideCatch-all & Routing
How to Use Catch-All Email for Typo Recovery Without Accepting Everything
Name the typo. Hold the rest. Use catch-all FORWARD for a week you staff, then turn it off.
catch all email typo recovery
Read the guidePrivacy & Masked Email
Email Privacy Without Disposable Addresses: A Long-Term Strategy
Cut the shop string. Keep the human inbox and the domain.
email privacy non disposable alias
Read the guideSMTP Send-as
Authenticated SMTP for Custom Domain Email: Complete Guide
MX receives. Authenticated SMTP sends the domain. Not an open relay. Probe outward to a mailbox you do not own.
authenticated smtp custom domain
Read the guideEmail Forwarding Fundamentals
Email Forwarding to Gmail vs Outlook: Practical Differences
Keep the inbox you already search. Publish one MX set, prove inbound from another mailbox, then attach Gmail Send mail as or Outlook SMTP.
email forwarding gmail vs outlook
Read the guideBuyer Guides & Decision
Custom Domain Email Buyer Guide for Personal Domains
custom domain email personal buyer guide: one MX set, leftover hosts gone, Gmail or Outlook as the store.
custom domain email personal buyer guide
Read the guideSPF DKIM DMARC SRS ARC
How to Publish DKIM for Authenticated SMTP Sending
DKIM is a DNS key plus a signature on mail you send. It is not inbound MX. Free has no send-as.
publish dkim smtp
Read the guideDNS & MX
MX Record Troubleshooting Checklist for Custom Domain Email
Pretty MX panels lie. Two resolvers, one owner, then an external probe. Demoting old hosts is not deletion.
mx record troubleshooting
Read the guideEmail Aliases
How to Organize 50+ Email Aliases Without Losing Track
If you cannot print the list, you are not ready for fifty. Hold, retire leaks, probe brochure names after MX changes.
manage many email aliases
Read the guideDNS Provider Guides
How to Configure Email Forwarding DNS in Namecheap
Advanced DNS. Exclusive MX. Email product leftovers are leftover MX.
email forwarding namecheap dns
Read the guideDNS Provider Guides
DNS Provider Migration Without Breaking Email Routing
Empty new zone plus NS change is an outage. Do not clone leftovers.
dns provider migration email
Read the guideEmail Aliases
Email Alias vs Disposable Email: Do Not Confuse These
An alias on your domain should still work next year. A disposable inbox is built to expire. Keep Gmail as the store. Never recover accounts on a burner.
email alias vs disposable email
Read the guideSecurity & Abuse
How to Avoid Sending Credentials to Support During Troubleshooting
email support credential safety: one MX set, leftover hosts gone, Gmail or Outlook as the store.
email support credential safety
Read the guideSecurity & Abuse
Why Open Relays Are Dangerous and How Verified Sending Prevents Them
Client, not server. AUTH plus mapped From. Close inbound 25.
open relay email security
Read the guide
