Catch-all & Routing
How to Audit Catch-All Abuse Before Enabling Forwarding
Read the hold queue for a week. Create real leftovers as aliases. Keep hold if harvest wins. Paid forward only with a stop date.
catch all abuse audit
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.
Business Role Addresses
How to Set Up hello@ for a Startup Using Gmail
hello email startup gmail: one MX set, leftover hosts gone, Gmail or Outlook as the store.
hello email startup gmail
Read the guideMigrations
Cloudflare Email Routing to MailerZ Migration Guide
One inbound owner. Turn Routing off. Screenshot is rollback, not a backup MX row.
cloudflare email routing migration
Read the guideDeveloper & Website SMTP
How to Send Transactional Website Email Without Running Postfix
The VPS stays a website. Copy dashboard SMTP. Close port 25. Prove both directions.
send website email without postfix
Read the guideBuyer Guides & Decision
Email Forwarding Service SLA: What Can Providers Really Guarantee?
Ask what a refuse looks like in writing. Distrust inbox percentages. We do not sell SOC 2 or an inbox SLA.
email forwarding sla
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 guideCustom Domain + Gmail
Why Gmail Shows 'via' on Forwarded Mail and How to Avoid It
via is Gmail’s UI, not an MX record. Do not rewrite From to hide it. Prove the hop. Do not promise it will never appear.
gmail forwarded email via
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 guideDeliverability & Spam
How Sender Reputation Interacts With Email Forwarding
Reputation follows Header From. The hop cannot wash a vendor Gmail already hates.
sender reputation email forwarding
Read the guideDNS & MX
How to Change MX Records Without Losing Email
Routes before MX. One exclusive set. Dual MX is how mail is lost.
change mx records without losing email
Read the guideAgency & Multi-domain
How to Onboard a New Client Domain Without Breaking Existing Mail
client email domain onboarding: one MX set, leftover hosts gone, Gmail or Outlook as the store.
client email domain onboarding
Read the guideBuyer Guides & Decision
Best Email Forwarding Service for Custom Domains in 2026
Pick by tests, not adjectives. Keep Gmail or Outlook. Prove inbound from another mailbox. Free receives. Solo $40/yr starts send-as.
best email forwarding service custom domain
Read the guideBusiness Role Addresses
How to Set Up careers@ and Change the Destination When HR Changes
Print careers@ once. Change the destination, not the jobs page.
careers email alias
Read the guideSMTP Send-as
How to Configure Outlook to Send From a Custom Domain Address
Outlook keeps the inbox. SMTP sends the domain. Copy the dashboard pair. Prove Header From on a third mailbox.
outlook send from custom domain smtp
Read the guidePrivacy & Masked Email
Firefox Relay vs Custom Domain Email Aliases
firefox relay vs custom domain alias: one MX set, leftover hosts gone, Gmail or Outlook as the store.
firefox relay vs custom domain alias
Read the guideEmail Aliases
Best Email Alias Service for Custom Domains: How to Choose
Map the addresses you print. Keep the inbox you already use. Hold unknown mail. Prove inbound from another mailbox before the footer changes.
best email alias service
Read the guideEmail Aliases
Email Alias Checklist: 12 Questions to Ask Any Provider
Ask twelve route questions before you publish MX. Silent catch-all and leftover hosts fail the list even when the price is zero.
email alias provider checklist
Read the guidePersonal Domains
Should You Use Catch-All on a Personal Domain?
Guesses should not train Gmail. Hold them.
personal domain catch all
Read the guideBuyer Guides & Decision
What to Ask Before Moving Your Domain Email to a Forwarding Service
Write the answers. Then point MX. Rehearse first.
email forwarding provider questions
Read the guideSPF DKIM DMARC SRS ARC
ARC Explained: How Forwarders Preserve Authentication Evidence
ARC records what a hop saw. Destinations may ignore it. MailerZ still does not rewrite Header From.
arc email forwarding
Read the guideEmail Aliases
What Is an Email Alias? Examples, Uses and Limitations
A named map, not a mailbox. Examples: hello@, support@, vendor-unique strings. Limitation: inbound is not send-as.
what is an email alias
Read the guideBusiness Role Addresses
How to Set Up invoices@ for Accounting Workflows
Invoices are contractual. Name the alias. Do not bury them in catch-all FORWARD.
invoices email routing
Read the guideDeliverability & Spam
SMTP 421 Error: Temporary Failure or Real Problem?
421 means try later. Dual MX means a new outage. Empty history is not 421.
smtp 421 error
Read the guidePersonal Domains
Custom Domain Email for Families: Shared and Individual Addresses
Own lastname.com. Seat nobody extra. Hold the guesses.
family custom domain email
Read the guideEmail Forwarding Fundamentals
How to Change the Destination Inbox Without Changing Your Public Email
Edit the map, not the homepage. Add, probe, then remove. History does not move.
change email forwarding destination
Read the guide
