• We provide professional SMTP servers that work in a new way compared to other SMTP providers.
Usually there are two types of emails in terms of delivery speed.Instant (transactional) and mass.
We encourage you to use our service for mass email campaigns, although transactional emails work as well!

• Email deliverability is something that we know you care. That is why we periodically do email marketing campaigns ourselves and track how we perform. 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 few hours to few days depending on your message size, email list and SMTPBOX plan.
Check out this pdf to see some basic rules before sending mails.

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