We provide reliable and flexible SMTP servers that can adapt to all kinds of situations.
There are two main categories in terms of email delivery process. Mass emails and transactional emails.
We encourage you to use our service for mass email campaigns, although transactional emails work as well! You just have to tell us the purpose and we will make the adjustments.

  Email deliverability is something that we know you care about. That is why we periodically do email marketing campaigns ourselves and track the performance. For subscribers 98% of the emails are usually delivered and all in INBOX! For a targeted list of non-subscribers 80% of emails are delivered with ~50% INBOX rate.
Campaigns usually are sent within a few hours to a few days depending on your message size, email list and SMTPBOX plan. Keep in mind that our service is focused more on deliverability than speed.

  Check out this blog article if you are planning to send cold emails.

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If having troubles,direct communication with us is strongly advised,as sending so many emails is serious business.