SPF DKIM DMARC SRS ARC
How to Check SPF Without Creating Duplicate Records
Two v=spf1 TXT records is a permerror. Look up in public. Merge. Do not let a wizard add a second SPF.
duplicate spf records
Read the guideMailerZ Blog
Domain email guides you can operate.
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SPF DKIM DMARC SRS ARC
SRS Explained: The Right Way to Rewrite the Forwarding Envelope
sender rewriting scheme srs: one MX set, leftover hosts gone, Gmail or Outlook as the store.
sender rewriting scheme srs
Read the guidePrivacy & Masked Email
Should You Use Random Aliases or Human-Readable Aliases?
hello@ is for humans. x7k2@ is for blaming a leak. Do not print random on an invoice.
random vs readable email aliases
Read the guideSMTP Send-as
SMTP Username, Password and Sender Identity: What Must Match?
AUTH is not a decorative username. From is not a free-text field. They must both be allowed.
smtp sender identity authentication
Read the guideCustom Domain + Gmail
How to Send as Your Custom Domain From Gmail Without Workspace
Keep Gmail as the inbox. Add a verified domain identity, authenticated SMTP, and a two-direction test before you cut production mail over.
send as custom domain gmail without workspace
Read the guideEmail Forwarding Fundamentals
Email Forwarding Service: What to Look for Before You Buy
Ask MX, leftovers, hold, store, 550, send-as. Skip inbox-rate badges.
email forwarding service
Read the guideCost & Workspace Alternatives
Cheapest Way to Use a Business Email Address With Gmail
Keep Gmail as the store. Prove inbound on Free. Pay $40 a year only when replies must show the domain. Do not buy a suite seat for a stamp.
cheapest business email with gmail
Read the guideSPF DKIM DMARC SRS ARC
How to Read Authentication-Results Headers in Gmail
authentication results gmail: one MX set, leftover hosts gone, Gmail or Outlook as the store.
authentication results gmail
Read the guideTroubleshooting & SMTP Codes
How to Read a Full SMTP Response Without Guessing
Paste the line. Name the hop. Honor the class. Do not guess from an icon.
read smtp response
Read the guideCustom 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 guideDNS & MX
How to Roll Back an MX Migration Safely
Exclusive old screenshot. Delete the new set. Dual MX is how the failed cut started.
mx rollback plan
Read the guideAgency & Multi-domain
How to Consolidate Client Domain Email Into Existing Inboxes
Maps not mailbox farms. Serial cuts. Existing Gmail tabs.
client domain email consolidation
Read the guideEmail Aliases
Email Alias vs Forwarding Address: Is There a Difference?
Print the alias. Verify the forwarding address. They are two fields on one route. One MX set, an external inbound test, then paid send-as if the name must leave.
email alias vs forwarding address
Read the guidePrivacy & Masked Email
Can Sites Detect Email Alias Providers?
Brand domains are meant to be seen. Do not fake Google MX.
detect email alias provider
Read the guideDelivery Recovery & Observability
Email Incident Postmortem Template for Routing Failures
Write the Friday so it does not repeat. Artifacts not vibes.
email routing incident postmortem
Read the guideAgency & Multi-domain
How to Build a Reversible Email Migration Process for Agencies
Save the exclusive set. Cut one owner. Rollback is republish, not both MX live.
agency email migration process
Read the guideDNS & MX
MX Records Explained: How Email Knows Where to Go
MX is the door, not the inbox. Publish one set. Delete leftovers. Probe from another mailbox.
mx records explained
Read the guideCatch-all & Routing
Hold vs Forward vs Reject Unknown Recipients: Best Practice
Create printed aliases. Probe an unknown name. Keep Free hold until a typo is worth a dated forward. Do not ingest the internet into Primary.
unknown recipient hold forward reject
Read the guideDelivery Recovery & Observability
Email Delivery History: What a Forwarding Service Should Show You
Ask for the SMTP sentence and the From. Pretty graphs without 550 text are decoration.
email forwarding delivery history
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 guidePrivacy & Masked Email
Email Aliases After a Data Breach: What You Can Learn
One alias per vendor is a sensor. After a leak, kill that string. Keep the domain.
email alias data breach
Read the guideBusiness Role Addresses
How to Set Up legal@ and Keep Delivery Evidence
Route legal@ cleanly. Do not call a hop store a legal hold. Counsel keeps the archive.
legal email delivery routing
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 guideEmail Forwarding Fundamentals
Email Forwarding Architecture: Envelope, Header, SRS and Delivery Hops
Envelope can change. Header must not. Hops have numbers. Leftover MX ends hop one.
email forwarding architecture
Read the guidePrivacy & Masked Email
Why Some Websites Block Disposable or Alias Domains
Own the zone if the signup must succeed. Disposable lists are real. MailerZ is not a disposable host.
websites block email aliases
Read the guide