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Total Contacts
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Gmail
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Outlook
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Domain Emails
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Anti-Spam Delivery Guide โ€” 2025

SPF / DKIM / DMARC
Configure DNS records on your iRedMail server. Gmail and Outlook now reject non-compliant bulk senders.
Batch Sending
Send 50 emails, wait 60 seconds. Prevents rate-limiting and IP blacklisting from major providers.
Unsubscribe Link
Every email includes a one-click unsubscribe. Required by Gmail, Yahoo and Outlook for bulk senders.
Spam Rate under 0.3%
Keep complaints below 3 per 1000 emails. Monitor via Google Postmaster Tools.
Reply-To Address
Use a real monitored mailbox. No-reply hurts deliverability and may violate CAN-SPAM.
Warm-up IP
New domain/IP: start with 100 emails/day, increase 20% daily over 2 weeks.

Recent Campaigns

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Campaign Details

Anti-Spam Batch Settings

Configure recipients to see time estimate

Attachments (optional, max 25MB)

Drop files here or click to upload

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Select recipients and a template to continue
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iRedMail SMTP Configuration

iRedMail Anti-Spam Checklist

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SPF Record

Add v=spf1 mx ~all to your domain DNS TXT record

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DKIM Signing

iRedMail auto-configures Amavisd DKIM. Verify DNS record is published.

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DMARC Policy

Add v=DMARC1; p=none; rua=mailto:[email protected]

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Reverse DNS (PTR)

Your mail server IP must resolve back to your hostname.

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Google Postmaster Tools

Register at postmaster.google.com to monitor sender reputation.

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IP Warm-up

New IP: start 100/day, increase 20% daily for 14 days.