There are numerous questions and important considerations when it comes to bulk email. You can do much more than just send simple newsletters – you can efficiently, reliably, and professionally reach large recipient groups. This is made possible by using a whitelisting-capable provider or an SMTP relay that ensures professional and scalable delivery.

We have summarized five key aspects of bulk email delivery for you.

We frequently receive questions on this topic. That’s why we have compiled the most important points and address five central questions below:

How can I reliably and securely reach large recipient groups?
By using a whitelisting-capable provider or an SMTP relay, you ensure that your emails do not end up in the spam folder and that your sender reputation remains protected.

How many emails can I send per hour or per day?
The sending rate depends on the provider, your plan, and the infrastructure. Many providers allow thousands to tens of thousands of emails per hour, especially when the account is approved for high volumes.

Do I need a dedicated tool, or is an SMTP relay sufficient?
For many use cases, an SMTP relay is sufficient to send emails automatically and at scale from your existing infrastructure – without the need for a complex email marketing tool.

How can I measure the success of my emails?
Even with a relay, open and click rates can be tracked if appropriate tracking mechanisms are integrated. This allows you to quickly identify which content performs best.

How can I optimize deliverability?
Make sure to implement proper authentication (SPF, DKIM, DMARC), maintain clean mailing lists, and regularly update recipient data. A whitelisting-capable provider additionally supports you in achieving high deliverability rates.

With centralized data management in a CRM system, companies can also establish a consistent process for tracking initial contacts and sales opportunities. Real-time data entry ensures your team always has accurate information about previous touchpoints and interactions.

When you send emails, they do not simply travel through a line like a physical letter.

Instead, computer programs use so-called protocols—agreed sets of rules that ensure messages are transmitted correctly. The most widely used protocol for sending emails is SMTP, short for Simple Mail Transfer Protocol.

SMTP defines how emails are sent from your email program or server to the recipient’s email server. It specifies commands, formats, and processes so that both sides—the sending and receiving servers—clearly understand what to do.

For simple email communication, your own server or provider usually handles delivery. However, when you want to send large volumes of emails—such as member updates, newsletters, notifications, or marketing campaigns—sending them through your own server can become problematic due to the volume.

This is where an SMTP relay comes into play. A relay is an intermediary server that forwards and delivers your emails. It ensures messages are transported efficiently and reliably to their destinations without overloading your own server.

A key advantage of an SMTP relay is improved deliverability.

Many relay providers operate with whitelists and maintain a strong sender reputation, which means your emails are less likely to end up in spam folders. In addition, relay servers can handle large volumes simultaneously and allow you to scale your email delivery—for example, when reaching thousands of subscribers.

In summary: SMTP is the protocol that governs email transmission, while an SMTP relay is a specialized server that reliably forwards emails. Together, they enable secure, efficient, and scalable delivery—from individual messages to large-scale email campaigns.

Important: Be sure to properly update and configure the DNS settings of your sending domain accordingly.

Do you have questions or would you like to start sending bulk emails faster? Get in touch with us.

Sending bulk emails via a professional mailing tool offers companies numerous advantages. With such a tool, you can reach large recipient groups simultaneously without overloading your own email server.

Emails sent through a mailing tool are delivered reliably, personalized, and visually appealing.

Whether using templates or custom designs, emails can be created very individually. Add images, your logo, location maps, and much more to give your messages the look and feel of your corporate design.

A mailing tool allows you to easily plan, segment, and automate your content. You can target different audiences, personalize subject lines and content, and measure responses such as opens and clicks.

This enables you to clearly see which content resonates best with your recipients and continuously optimize your strategy.

Especially practical: Many tools automatically handle deliverability, whitelisting, and unsubscribe management, ensuring your messages reliably reach your recipients’ inboxes. At the same time, you save time and effort, as recurring campaigns can easily be automated.

With a mailing tool, sending large volumes of emails becomes an efficient, secure, and transparent process—whether you are distributing newsletters, notifications, or promotional emails.

Here as well, it is important to properly configure the DNS records of your sending domain.