How to run email on your domain.

DNS & Deliverability 11 Oct 2026

Email Authentication Troubleshooting: SPF, DKIM, DMARC, Then Alignment

A practical order for diagnosing email authentication failures: start with the Authentication-Results header, check SPF, then DKIM, then DMARC policy and alignment. Know when to stop and open a specialized guide.

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Developer Guides 11 Oct 2026

Amazon SES Sandbox vs Sending Quota: Two Different Limits

Amazon SES sandbox is an account status that restricts recipients and volume. Sending quota is a separate rolling 24-hour limit that remains after production access. Learn the difference.

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Developer Guides 09 Oct 2026

SMTP Port 465 vs 587: Implicit TLS or STARTTLS?

Port 465 is implicit TLS and port 587 is STARTTLS. Neither is deprecated. Match the handshake your host requires. Arawa Mail documents mailbox clients on 465 only.

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DNS & Deliverability 08 Oct 2026

Email Return-Path: How to Read MAIL FROM and Diagnose Bounces

Return-Path is the receiver's copy of MAIL FROM. Bounces go there, not to From. An empty Return-Path marks a DSN, not a broken sender.

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DNS & Deliverability 08 Oct 2026

Amazon SES Domain Verification Stuck: Easy DKIM CNAMEs and DEED

SES domain still pending? Check DEED first, then the three Easy DKIM CNAMEs at authoritative DNS. 72 hours is a ceiling, not a fix.

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Developer Guides 07 Oct 2026

Amazon SES Rate Limit Errors: ThrottlingException and 454 Throttling

Amazon SES drops the message on a rate or quota limit. The API returns ThrottlingException; SMTP returns 454. Tell rate errors from daily quota errors before you retry or request a higher quota.

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DNS & Deliverability 07 Oct 2026

How to Fix SPF PermError: Too Many DNS Lookups

SPF PermError from too many DNS lookups means the record failed evaluation, not a temporary DNS blip. Remove unused mechanisms before flattening, and keep the apex under 10 lookups.

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DNS & Deliverability 01 Oct 2026

Double Opt-In for Newsletters: Confirmation Flow and Subscriber States

Build a newsletter double opt-in flow with pending, confirmed, expired, and unsubscribed states. Send the confirmation; do not mail unconfirmed addresses.

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Business Email Setup 01 Oct 2026

IMAP Folders Not Syncing: Fix Missing Sent Mail and Duplicate Folders

Sent mail missing on your phone but present in webmail? Fix IMAP folder subscriptions, special-folder mapping, and path prefix without deleting unique mail.

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DNS & Deliverability 29 Sep 2026

How to Tell Which Email Provider a Domain Uses from Its MX Records

Look up a domain’s MX hosts and map them to Google Workspace, Microsoft 365, Zoho, Fastmail, Cloudflare Email Routing, Arawa Mail, and common hosting. Practical provider fingerprints before you change MX.

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Developer Guides 28 Sep 2026

Testing Email in Laravel Applications

Test Laravel mailables and notifications with Mail::fake() and Notification::fake() so CI never sends real email. Assert recipients, subjects, and queued status safely.

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DNS & Deliverability 28 Sep 2026

How to Check DKIM Status and Diagnose Failures

Check DKIM status with a DNS lookup or free checker, then diagnose missing selectors, wrong keys, and alignment failures that break deliverability.

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