<p>Mailtrain allows you to easily manage even very large lists. Million subscribers? Not a problem. You can add subscribers manually or import from a CSV file. All lists come with support for custom fields and merge tags as well.</p>
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<h2>Custom fields</h2>
<p>Text fields, numbers, drop downs or checkboxes, Mailtrain has them all. Every custom field can be included in the generated newsletters through merge tags.</p>
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<h2>List segmentation</h2>
<p>Send messages only to list subscribers that match predefined segmentation rules. No need to create separate lists with small differences.</p>
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<h2>Open source</h2>
<p>Mailtrain is available under <a href="http://www.gnu.org/licenses/gpl-3.0.en.html">GPLv3</a> license and completely open source.</p>
<p>Amazon SES, SparkPost, SendGrid, Mailgun – you name it. You can use any provider that supports SMTP protocol to send out your newsletters. Bounce and complaints handling via webhooks is supported for SES, SparkPost, SendGrid and Mailgun.</p>