If you just started with email marketing or switched your delivery provider or even our domain or IP address it’s a good practice to not start blasting your provider with too many emails at once.
With Mailster you can slowly increase your mail throughput over time. Go to Settings => Delivery to find the Warmup settings.
Define the timeframe you like to warm up your server. The percentage will be used to determine the number of emails sent by your current settings. If you send usually 1000 mails per batch and the Warmup is set to 14 days – 55% Mailster will send 550 mails per patch and increase it slowly for 14 days until it reaches 100% again.
If you start fresh you should consider taking a one-month warm-up period. Mailster will adjust the send rate according to your setting and increase the mails which are sent in a batch.
This option works even better if you enable automatically calculated batch size.