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      <title>Postal vs Stalwart vs Haraka: Best Self-Hosted SMTP Relay 2026</title>
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      <description>&lt;p&gt;If you&amp;rsquo;re sending transactional emails, running a mailing list, or building a self-hosted mail infrastructure, relying on commercial SMTP providers like SendGrid, Mailgun, or Amazon SES means giving up control over your email pipeline — and paying per-message fees that add up quickly. Self-hosted SMTP relay solutions put you back in charge: no per-email costs, full data privacy, and complete control over deliverability, routing, and compliance.&lt;/p&gt;</description>
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