Bulk Email Smtp Server Hosting – The standard network protocol SMTP (short for “Simple Mail Transfer Protocol”) has governed the delivery and forwarding of e-mail worldwide since the 1980s. However, e-mail sent does not always go directly to the addressee – it is often unsolicited or even restricted for security reasons. Instead, submissions are made possible through an external third-party server. Such a well-configured “smart host” serves as an upstream SMTP relay to process large volumes of messages while preventing spam. Everything you need to know about it.
The term “SMTP relay” (or “e-mail relay”) is defined in many conflicting ways on the Internet. Some sources speak of a process, others of a service, others use the term as a synonym for SMTP server or even associate it with Simple Mail Transfer Protocol (SMTP). Everyone is fit to some extent, but they cannot combine the individual aspects in a meaningful way.
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Therefore, here follows an attempt at a clear definition: SMTP relay is the process of forwarding e-mail from a sender to a recipient over the Internet (from the English “to relay”, which means “forwarding”); This process is carried out according to the Simple Mail Transfer Protocol using so-called SMTP relay servers, which in turn can be part of an external service (SMTP relay service).
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) as defined earlier, is an SMTP server that enables SMTP transmission. This means it receives emails from the sender and forwards them to any third party. This is usually an external third-party server on the Internet that is connected between the sender’s and recipient’s SMTP servers (and any other mail transfer agents, or MTAs for short). On the other hand, when messages are sent to the same domain as the mail provider, no other server is involved, and therefore there is no question of e-mail transmission in this case.
SMTP relay occurs when an SMTP relay server forwards email from a sender to a recipient in another domain.
A difference can also be imagined: if you send a letter to a distant relative, the local post office will first send it to the post office closest to the recipient, and then it will finally be delivered (relay); While sending to the same place, the post office concerned will deliver the letter directly to the destination address (without transfer).
An SMTP relay server can be either “closed” or “open” depending on how it is configured. In this context, a distinction is made between “smart host” and “open mail transfer”. Additionally, the email relay that sits in front of the sender’s outgoing mail server can perform other useful functions.
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A properly configured SMTP relay server is also known as a “smart host”. It is “smart” in the sense that it will only forward an email if it is responsible for the sender or recipient. However, emails from unauthorized parties outside the server’s jurisdiction will be rejected. This extension is possible using different authentication methods such as Whitelists, SMTP-After-POP or ESMTP with SMTP-Auth.
However, the disadvantage of SMTP is that its default configuration does not require user authentication at all. If you do not manually add the appropriate mechanisms to the SMTP relay server, it will be considered misconfigured and thus “open mail transfer”. In simple language, this means that the server also forwards e-mails for which neither the sender nor the receiver is responsible.
These circumstances allow cybercriminals to spread large-scale spam across the Internet using fake or stolen sender addresses. If such exposed traffic is detected, it will usually be blacklisted by the major webmail providers within hours or days. All messages sent by it, even legitimate ones, are then classified as spam and filtered out. You, as the operator of a misconfigured SMTP relay server, are at a disadvantage: you have to fix the security gap and request removal from the blacklist. Additionally, this work can mean financial loss for companies and organizations.
Open Mail Relay has no authentication mechanism and therefore also spreads spam, so such SMTP relay servers quickly end up on the blacklist of providers.
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Extensions and upgrades to e-mail systems are typically not applied directly to the sender’s outgoing mail server, but instead are implemented through an upstream SMTP relay server. In order to “retrofit” multiple functions at once, it is also possible to have actual “relay chains” that process email in different ways before it reaches the Internet. These other areas of use include:
Consider the following scenario: You run a small business or organization whose employees primarily communicate with each other and a small group of customers via e-mail. As long as the volume of individual messages is relatively small, there is nothing wrong with handling all correspondence originating from a large webmail provider.
However, the situation is very different when your company and with it the number of e-mails grows gradually. To prevent the daily flood of spam, most Internet and e-mail providers limit the number of messages that can be sent per day. Bulk emails, newsletters and automated transactional messages such as order confirmations that are intended to be sent to thousands of recipients require an affordable, scalable and reliable delivery platform that can cope with the unique needs of a growing company.
One option is to set up your own SMTP server. However, if you use your own hardware for a lot of external email, large amounts of data can take up bandwidth and prevent internal peer-to-peer correspondence. Another disadvantage is the acquisition cost and the large amount of work with server management. In addition, emails from external SMTP relay servers are often classified as spam. The same applies to those with dynamic IPs.
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Because of these limitations, many companies choose to turn to a professional SMTP relay service that runs its own server to relay e-mail. Mail packages from providers such as Mailjet, Sendinblue or TurboSMTP specialize in handling large numbers of emails, their pricing model is scalable based on the volume of messages and they usually have a solid reputation with internet and post providers as they work in close collaboration. . After setting up the appropriate service, you can use your email application (eg Microsoft Outlook) to send and receive messages as usual.
In addition, many SMTP relay services offer additional added value, such as a reporting function: with the provider’s SMTP relay server that automatically inserts a link tracker into the body of each email, you can collect economically valuable data such as opens, clicks and bounce rate. as well as the submission process or feedback on your newsletter (eg spam complaints or unsubscribes). If interpreted and used correctly, this information can serve as a basis for customizing and modifying your email marketing campaigns.
If you try to send a message using your email client and the sending fails, you will receive a corresponding error message from the server, including an SMTP status code. For example, the message “550 Requested action not taken: Mailbox unavailable” means that the destination address was not reached. Since this problem can have various causes, there are…
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StartTLS Starts encrypting email using the TLS protocol. To do this, the server first performs an encrypted ping and asks for StartTLS support. If the answer is yes, an encryption method can be used. StartTLS is convenient because if the method is accepted, encryption happens automatically. No special port required…
Anyone who deals with the technical background of electronic mail transmission will sooner or later come across the term “SMTP server”. But how exactly does this unit of hardware and software work, transferring electronic mail from point A to point B in the background and invisible to the average user? If you know this, you can use this knowledge to your advantage – for example…
Black Friday Deals Start saving now with Black Friday deals on everything related to hosting, websites, WordPress and more. For a short time only! All offers from €1/month webhosting Now €1/month MyWebsite Now €1/month WordPress When you send an e-mail, the sender communicates with the recipient at the same time. However, when you’re dealing with transactional emails or bulk emails in your app, it’s not possible to send them all at once. Emails are stored in SMTP queues that provide temporary storage before processing. When the recipient is able to receive the emails, they are sent. Here we’ll explore why you should opt for email queues in your application and how it can be done.
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E-mail queues are a mandatory part of SMTP servers. It is a system that creates a series of emails waiting to be processed for delivery. An e-mail queue is a form of queuing – asynchronous communication between services. The purpose of a message queue is to separate the production process from the consumption process. An email queue separates the sender from the recipient. It allows them to communicate without connecting. As such, queued emails wait to be processed until the recipient can receive them.
You can think of an email queue as a buffer where emails are stored before they reach the endpoint. At the same time, the sender does not have to send each message separately. Communication between sender and receiver
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