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SMTP Bulk Email Service


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SMTP Bulk Email Service

With our SMTP Bulk Email Service, you will receive formatted email accounts that you can load directly into CBT Mass Email Sender Software and start sending thousands of bulk emails by rotating between these email accounts. Our Fast SMTP Server for Bulk Email Campaigns is lightning fast, safe and avoids bans.

You will receive approximately 5,000 formatted email accounts inside a notepad file that you can load directly into the CBT Mass Email Sender Desktop Software and start sending thousands of emails at lightning fast speeds. Unlike an SMTP Bulk Email Service, you will receive thousands of separate email accounts. The CBT Bulk Email Sender will rotate between all email accounts by sending out a fixed number of emails from each account. This means that even if one email account gets blocked or blacklisted, your bulk email sending campaign will not be interrupted because the email sender will simply rotate to the next working SMTP email account. As you will no doubt know, most SMTP Bulk Email Service providers will ban your entire account arbitrarily if they detect that you are doing a mass email blast. Our Fast SMTP Server for Bulk Email Campaigns offers many "churn and burn" disposable emails at a very low price. Once you start to notice that your emails are no longer working, simply come back and buy some more. From our internal tests, we have noticed that our emails stay alive for around 2 to 4 weeks. It is recommended that you spread out your mailing list across as many SMTP emails as possible (our gold standard is 5,000 email accounts).

Why Choose Our SMTP Bulk Email Service

Guide to SMTP

Emailing –a quick, short means of communication through the internet, just write and send! It hardly takes a few minutes to reach the other side of the world the same way you had generated it. It’s fascinating how humans have developed technology so much over time.

Behind every technological development there is a set of rules and instructions followed to gain the desired outcome, so is the case with emailing. It is based on various protocols and cloud-based systems that enable users to send and receive emails.

In this article, we’ll show you the insights of SMTP, an email protocol, its limitations and how it differs from other protocols.

What is SMTP?

SMTP or Simple Mail Transfer Protocol is a set of rules for electronic mail transfer. It was initiated by the internet authorities dedicated to setting standards for internet activities and ensuring technical development.

To make it simpler, let’s think of it as a post office. When a user generates an email and clicks send he does not actually send the email into the receiver’s inbox. That email goes to an SMTP server that acts as a post office and forwards the email to another SMTP server –the destination’s post office. Finally, the other SMTP forwards the email to the receiver.

Why Do You Need An SMTP Server?

Using the SMTP server is a way to send emails but it’s not the ONLY way. Thus, you can send emails directly to the recipient’s SMTP server without connecting your client to a remote SMTP yourself. However, it comes with its drawbacks that initially guided towards the development of SMTP servers.

Greater Chances Of Spam Emails

Dropping an SMTP server increases your chances of getting spam emails. Since spammers do not retry sending emails, using an SMTP server reduces spam emails by 80%. These servers use various techniques like greylisting to prevent spam emails. In greylisting email providers usually repudiates the connections with new senders who haven’t interacted with the receiver before. Legitimate senders will try to reach again while spammers would not attempt that, which reduces spam emails.

Skeptical Sender’s Reputation

Using a reputable SMTP server to send emails portrays the sender’s legitimacy which is missing when the email is sent directly from a computer. It might lead to the recipient’s server dropping connection upon receiving your email. There are other several instructions that the servers follow to keep a reliable reputation.

What Type Of Emails Can Be Send With SMTP?

Generally, you can only send text emails with SMTP as the server cannot process images, videos, or any such attachments. However, with MIME, sending emails with attachments is possible now. MIME stands for Multipurpose Internet Mail Extension, which is an SMTP’s add-on protocol. This protocol turns all non-text messages into text format when sent via SMTP.

Does your receiver receive it in a non-text format?

No, once your email reaches its destination, all the non-text messages are reverted to their actual format. Hence, the receiver receives the email the way it was generated.

SMTP Relay Server: What Is It?

SMTP Relay is the procedure of routing emails from one to another SMTP server. SMTP Relay service ensures high deliverability at a faster pace. It is especially suitable for bulk emailing. This Relay service is based on two agents MDA and MTA.

MTA (Mail Transfer Agent)

MTA is a software inserted on the SMTP server to communicate with MSA –the Mail Submission Agent, for retrieving MUA generated emails. MUA is the Mail User Agent like Gmail and Yahoo.

MTA checks the email address of the recipient to see if it’s from the same domain or a different one. The different emails are forwarded to another MTA to proceed further.

MDA (Mail Delivery Agent)

MDA is the software component responsible for the delivery of mails to local recipients. It is also known as LDA OR Local Delivery Agent.

SMTP Relay Port

SMTP Relay ports are the computer’s endpoints that are linked to the SMTP communication network. There are several ports, each with a different purpose. The most common SMTP ports are 2525, 587, 465, and 25. They are not the only ports, but their accessibility makes them reliable and highly preferred over others. When initiating communication it is important to choose the right SMTP port.

Is SMTP Different From Other Protocols?

There are various email protocols working at different levels around the world. They vary based on their scope and features. SMTP is one of the most common protocols with IMAP and POP being the other two. Here is a glimpse of these protocols and how SMTP differs from them.


POP or Post Office Protocol is designed for incoming emails. POP3 is the latest version in use these days. This protocol is suitable if you always check your email on the same computer. POP’s biggest advantage is its offline version which downloads and stores emails to be reviewed later.

The major difference between the POP and SMTP is that SMTP is designed for outgoing emails while POP attends to incoming emails.


IMAP or the Internet Message Access Protocol is also used for incoming emails. IMAP due to its cloud-based storage is more favored than POP. It allows the user to access their emails wherever they want. Moreover, it is faster and has better storage than POP.

Like POP, the primary difference between SMTP and IMAP is that the later one is for incoming emails while the former one for sending emails.


Sending emails look a lot different on the back-end. SMTP servers are essential for sending emails and ensuring their deliverability. Although it has some limitations, they are not as strict. Understanding SMTP might seem a little difficult to beginners, but with the right emailing tools you can set it up.

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