How do I ensure my newsletter sending with an email delivery service is compliant with authentication and consent rules?

To keep newsletter sending compliant, focus on two areas:

1) Email authentication

Make sure your sending domain is properly authenticated so mailbox providers can verify that your emails are really from you.

Set up:

• SPF: Authorizes which servers can send mail for your domain.
• DKIM: Adds a cryptographic signature to prove the message wasn’t altered.
• DMARC: Tells receiving servers how to handle mail that fails SPF/DKIM and gives you reports.

Best practices:

• Use a custom sending domain or subdomain, e.g. news.yourdomain.com.
• Ensure the From domain aligns with SPF/DKIM and DMARC.
• Start DMARC in monitoring mode (p=none), then move to stricter policies once you’re confident.
• Check that your delivery service’s DNS records are correctly published and passing.

2) Consent and subscriber permissions

Only send newsletters to people who have given you valid permission to receive them.

Use:

• Explicit opt-in when required by your jurisdiction or policy.
• Double opt-in where appropriate, especially for higher trust and lower spam complaints.
• Clear signup language explaining:
  • what they’ll receive,
  • how often,
  • what company is sending it.

Maintain records:

• Timestamp of signup
• Source of signup form
• IP address or other proof of consent, if appropriate
• The exact wording shown at signup

Unsubscribe and preferences:

• Include a clear unsubscribe link in every newsletter.
• Process opt-outs quickly, ideally immediately.
• Honor suppression lists so unsubscribed users are not re-added.

3) Operational compliance

• Do not use purchased or scraped lists.
• Segment transactional emails from marketing newsletters.
• Monitor bounce and complaint rates.
• Reconfirm inactive subscribers if needed.
• Review applicable laws: CAN-SPAM, GDPR, UK PECR, CASL, etc., depending on your audience.

4) Practical checklist

Before sending:

• SPF passes
• DKIM passes
• DMARC is configured
• Sending domain matches your brand
• Consent is recorded for each recipient
• Unsubscribe link works
• Physical address/contact info included if required
• Lists are clean and permission-based

If you want, I can also give you a compliance checklist by region or a technical setup checklist for a specific email provider.