Depending on your delivery method Mailster needs some time to send your campaigns.

If you like to increase your delivery rate you can do try following things:

Keep in mind that the bottleneck is always the connection from your server to your ESP’s server. Mailster can only send one mail at once and needs to send a request to your ESP for each email.

The average delivery speed is 1 to 2 mails per second. This can vary depending on your server structure and location.

Beside that you have to make sure your server is not running out of memory and you didn’t reach your servers time limit.

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