Nutshell Marketing supports email campaigns to millions of recipients, although most of our customers don’t have audiences this large. We use multiple systems to queue and deliver your marketing campaigns.
Bottom line: we have a target of delivering 25,000 messages per hour for every Nutshell customer — so a campaign to 100,000 recipients should complete in under 4 hours. In common practice, we will often be 5x faster than this.
Factors affecting delivery speed
A/B testing will cause your campaigns to be delivered slower, since Nutshell will launch your test, and then evaluate results before launching the rest of your campaign.
Some email providers place limits on the volume of incoming messages, and exceeding those limits can cause deliverability issues. We employ throttling to mitigate this. We prioritize the delivery of your messages over the speed of sending.