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Fastmail offers excellent forwarding capabilities with both simple rules and advanced Sieve filters.

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Setup Instructions

1

Create a Forwarding Rule

  1. Go to Settings → Rules (or Filters & Rules)
  2. Click Create rule
  3. Add conditions to identify newsletters:
    • From contains common newsletter domains
    • Subject contains newsletter keywords
    • List-Id header exists (most accurate)
2

Set Forward Action

Choose the action type:
  • Send a copy to: Enter [email protected]
    • Preserves original sender (recommended)
    • Better for DMARC compliance
  • Forward: Re-sends from your address
    • Replies come back to you
3

Advanced Filtering (Optional)

For power users, use Sieve scripting:
# Forward newsletters based on List-Id header
if header :contains "List-Id" "newsletter" {
  redirect :copy "[email protected]";
  keep;
}
Access via Settings → Advanced → Sieve Filtering
Fastmail’s “Send a copy to” (redirect) typically has better deliverability than traditional forwarding, especially with strict DMARC policies.

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Why Fastmail is Excellent for This

Fastmail is one of the best options for auto-forwarding newsletters because:
  • Powerful filters - Supports List-Id header matching (most accurate)
  • Sieve scripting - Advanced users can write custom logic
  • Better deliverability - “Send a copy to” preserves original sender
  • No limitations - All plans support full forwarding features

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Next Steps

Filter Tips

Learn smart filtering strategies to forward only newsletters

Back to Overview

Return to the main auto-forwarding guide