SMTP 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 guideMailerZ Blog
Domain email guides you can operate.
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Custom Domain + Gmail
How to Use a Custom Domain Email in Gmail Without Google Workspace
Keep the Gmail store. Point MX at a forwarder. Prove inbound from another mailbox. Pay only if replies must show the domain.
custom domain email gmail without google workspace
Read the guideDelivery Recovery & Observability
How to Build a Launch-Day Email Monitoring Checklist
Two resolvers. Foreign probe. Morning re-query. Self-send lies.
email migration monitoring checklist
Read the guideDNS & MX
Null MX Explained: Why Your Domain Rejects All Email
A lone dot in MX means senders must not deliver. Empty history is expected. Remove it to receive.
null mx record
Read the guideCost & Workspace Alternatives
How to Cut Email Costs When Most Addresses Are Only Aliases
Roles are map rows. People are seats. Cancel only after a third-mailbox probe.
reduce business email cost aliases
Read the guidePrivacy & Masked Email
Private Email Alias: What It Hides and What It Cannot Hide
Masks are not invisibility. Custom-domain aliases are even less anonymous — and more durable.
private email alias
Read the guideAgency & Multi-domain
Email Routing Capacity Planning: Domains, Aliases and Send Volume
Count first. Quote the card. Agency does not merge leftover MX.
email routing capacity planning
Read the guideAgency & Multi-domain
Agency Email Routing Runbook: DNS, Aliases, SMTP and Testing
Per-client NS, MX, map, SMTP, probe. Offboard is revoke, not courtesy leftover.
agency email routing runbook
Read the guideBuyer Guides & Decision
Unlimited Aliases: Useful Feature or Marketing Distraction?
A printed list plus exclusive MX is useful. A slogan is not. Hold unknowns. Caps are not an inbox SLA.
unlimited email aliases
Read the guideCatch-all & Routing
Catch-All vs Named Aliases: Which Is Safer for a Business?
Name the addresses you print. Leave unknown held. Enable paid catch-all forward only for a watched window, then prove inbound from another mailbox.
catch all vs email aliases
Read the guideCustom Domain + Gmail
Why Emailing Yourself Is a Bad Test for Gmail Forwarding
Self-send can stay inside Google. The MX path never runs. Use a second provider and a unique subject.
gmail email yourself forwarding test
Read the guideTroubleshooting & SMTP Codes
SMTP 550 Error: What It Means and How to Fix It
550 is permanent. Read the text. Unauthorized From is not a DNS mystery. Free has no send-as.
smtp 550 error
Read the guideCompetitor Comparisons
MailerZ vs Migadu: Forwarding + SMTP vs Mail Hosting
Forwarding keeps the inbox you trust. Migadu stores mailboxes. Pick the store, then publish exclusive MX.
mailerz vs migadu
Read the guideSecurity & Abuse
What Email Logs Should and Should Not Store
email log privacy: one MX set, leftover hosts gone, Gmail or Outlook as the store.
email log privacy
Read the guidePersonal Domains
How to Move Your Identity Away From a Gmail Address Without Leaving Gmail
Change the public string. Keep the search box. Exclusive MX. Fade the portals.
move email identity from gmail custom domain
Read the guideEmail Forwarding Fundamentals
How to Forward One Domain Address to Multiple People
Two destinations are a copy, not a shared mailbox. Name who answers. Probe both.
forward email alias to multiple recipients
Read the guideDNS and MX
How Long Do MX Record Changes Take to Propagate?
Wait the old TTL. Leftover hosts are not propagation. Two resolvers, then a third mailbox.
mx record propagation
Read the guideCost & Workspace Alternatives
Google Workspace Pricing vs Forwarding + SMTP for Small Teams
Price Workspace from Google’s page. Price MailerZ from aliases and send limits. Publish one MX set and prove inbound before you mix leftover Google records.
google workspace pricing alternative
Read the guideDelivery Recovery & Observability
How to Retry a Failed Email Without Creating Duplicates
One key. 4xx backoff. 5xx stop. Never clone a 250.
retry failed email safely
Read the guideDNS Provider Guides
Route 53 MX Record Priority and Formatting Explained
Priority is order. Demoting is not deletion. Hostnames not IPs.
route 53 mx priority
Read the guideSPF DKIM DMARC SRS ARC
DMARC p=none vs quarantine vs reject for Small Domains
p=none watches. Quarantine treats fails as suspect. Reject refuses them. Inventory senders, publish SPF and DKIM, and read rua before you tighten policy.
dmarc none quarantine reject
Read the guideSMTP Send-as
SMTP Authentication Failed: Checklist for Custom Domain Send-As
AUTH failed is a client pair problem. Free has no send-as. Leftover MX is a different ticket.
smtp authentication failed
Read the guideCustom Domain + Gmail
How to Receive hello@yourdomain.com in a Free Gmail Account
hello@ is a printed name. Map it to Gmail. Cut leftover MX. Probe from another mailbox. Do not buy a suite seat for one string.
receive custom domain email in gmail
Read the guideMigrations
How to Migrate From Registrar Email Forwarding to a Dedicated Service
registrar email forwarding migration: one MX set, leftover hosts gone, Gmail or Outlook as the store.
registrar email forwarding migration
Read the guideEmail Aliases
How to Create Unlimited-Looking Role Addresses Without Buying Seats
Seats are logins. Roles are names. Hold unknowns. Do not buy Google users for a footer.
email aliases without mailbox seats
Read the guide
