Performance & technical information

• Specifically optimized for MySQL (or MariaDB) so every database operation is done in the best possible way.
• It supports the following methods for sending emails:
  SMTP,
  Sendmail,
  PowerMTA
  Amazon SES smtp/api,
  MailGun smtp/api,
  SendGrid smtp/api,
  MailJet smtp/api,
  Mailersend smtp/api,
  Mandrill (Mailchimp) smtp/api,
  Postmark smtp/api,
  Brevo (Sendinblue) smtp/api.
• SMTP is the most versatile and powerful. SendMail uses the local mail transfer agent that is installed (Linux only, uses the sendmail_path).
• You may set-up multiple SMTP servers with load balancing and rotation.
  You can configure your SMTP servers to rotate with every new batch or allocate them evenly within a batch.
• You can use local or 3^rd party and external SMTP providers such as Amazon SES, SendGrid, Sparkpost, MailGun, MailJet, Smtp.com or any other. This is particularly useful for cases where you are in shared hosting and your Host will not allow you to send bulk mail.
• You have integrated bounces processing and in addition specific webhook endpoints with Amazon SES, MailGun, MailJet, SendGrid, Smtp.com, Mailersend, Mandrill, Postmark, Brevo for recording deliveries, bounces and complaints. See the docs.
• PowerMTA pickup delivery support. PowerMTA is an enterprise grade infrastructure application for email built to address the challenges of critical digital messaging environments and customer communications. More.
• You can use batches when you send. Sending in batches is highly recommended for two reasons. You put less strain on the server and so avoid potential time-outs and you improve deliverability.
• For all sending methods you have throttling options so you can fine-tune your sending speed and rate.
• With SMTP you can have daily & hourly quotas, authentication, SSL/TLS connections, throttling, and SMTP anti-flood. With the anti-flood you close & re-open the SMTP connection for x seconds after sending z emails. This is another great utility for improving deliverability. Many Hosts, ISPs and email service providers require you to do that.
• You can attach custom email headers specific to an SMTP server (that can be merged/personalized).
• Daily quotas can also be set at campaign and sender profile (also hourly) levels.

• Web server (configuration, processing power, memory).
• Database server (configuration, memory).
• SMTP (MTA) configuration and power: this is one of the most critical elements because it largely affects the sending speed of your email campaigns.
• Network latency which may be affected by the geographical distance of the communicating servers.

How fast can you send?

It depends on all the above factors. Anything from 2k/hour to 100k/hour is possible. If you use shared hosting you should ask your Host about how much/fast you can send per hour/day. nuevoMailer has all the required utilities and features to help you conform with your Host's policies.

Need to send faster?

Assuming your SMTP service (or other provider) can handle heavy loads then you can multiply your sending speed with the multi-threaded sending plugin.