dom4in.net

Articles

Short, tested walkthroughs for the domain-bound services teams set up most. Each one is a five-minute solve: the exact click-path, the records to copy, and the things that usually go wrong. Published over the last week.

SendGrid

Authenticate your SendGrid sending domain

Verify a sending domain in SendGrid with CNAME-based authentication so your mail is signed with your own domain instead of sendgrid.net.

Jun 21, 2026 · ~2 min read DMARC

Publish a DMARC record without breaking your mail

Publish a safe, monitor-only DMARC record at _dmarc.yourdomain.com, collect aggregate reports, then tighten the policy once you trust the data.

Jun 20, 2026 · ~2 min read SPF

Publish an SPF record for your domain

Create a single, correct SPF TXT record that authorizes your real senders and stays under the ten-lookup limit.

Jun 19, 2026 · ~2 min read Google Workspace

Turn on DKIM signing in Google Workspace

Enable DKIM signing for a Google Workspace domain by generating the key, publishing the TXT record, and turning on authentication.

Jun 19, 2026 · ~2 min read Email security

Read email headers to spot a spoofed message

A quick, repeatable way to inspect raw email headers and tell a genuine message from a spoof using SPF, DKIM, and DMARC results.

Jun 18, 2026 · ~2 min read PagerDuty

Create your first PagerDuty service with an email integration

Stand up a PagerDuty service with an escalation policy and an email integration so any tool that can send mail can open an incident.

Jun 18, 2026 · ~2 min read Microsoft 365

Verify your domain in Microsoft 365

Add and verify a custom domain in the Microsoft 365 admin center, then apply the recommended MX, SPF, and Autodiscover records.

Jun 17, 2026 · ~2 min read Cloudflare

Add your domain to Cloudflare and switch nameservers

Onboard a domain to Cloudflare DNS by importing existing records and changing the nameservers at your registrar without dropping mail or web traffic.

Jun 16, 2026 · ~2 min read Stripe

Verify your domain in Stripe for hosted checkout and wallets

Add and verify your domain in Stripe so Apple Pay, Google Pay, and Link buttons appear on your hosted or embedded checkout.

Jun 16, 2026 · ~2 min read Slack

Send email straight into a Slack channel

Use Slack's built-in Email app to generate a per-channel address so alerts, forms, and vendor notifications land in Slack automatically.

Jun 15, 2026 · ~2 min read