What Is an SMTP Check?
Definition
An SMTP (Simple Mail Transfer Protocol) Check is used to verify whether an email address is real and ready to receive messages. It does not send an email per se. Instead, it simply confirms that the address is live. This entire process usually takes just seconds. It is fast, efficient, and invisible to the recipient. It is an easy way to validate contacts before sending a campaign.
Example
For instance, say you are getting ready to launch a campaign to a subscriber list of 10,000. Before sending, you run an SMTP check on the list. It identifies 300 invalid addresses, which you remove to keep the campaign clean. Now, with these addresses filtered out, you have a better chance of reaching real inboxes and seeing improved engagement.
How Does SMTP Check Work?
SMTP checks operate through a series of basic steps that confirm whether an address is legitimate:
- Server Connection. The SMTP check begins by connecting to the email server associated with the domain. For instance, it uses the domain in “example.com” to find the right server.
- Verification Request. After the connection is established, a message verification request is sent. The check does not actually send an email; it just checks whether the server will accept one for that address.
- Server Response. The server then replies, providing a code that indicates if the address exists and is active. If the server signals approval, the address is valid.
- Result Processing. Addresses that are flagged as invalid can then be removed from the list. This way, you avoid sending messages that will just bounce back.
Benefits of SMTP Check
Using SMTP checks in email marketing offers several advantages:
- Increases Deliverability. SMTP checks help you reach real contacts by filtering out invalid addresses, which can reduce bounce rates.
- Protects Sender Reputation. Invalid emails affect your reputation with Internet Service Providers (ISPs). SMTP checks help keep your list clean, which, in turn, maintains a positive reputation.
- Saves Time and Resources. Sending emails to invalid contacts wastes both bandwidth and budget. An SMTP check refines your list so that messages only reach legitimate recipients.
- Reduces Spam Complaints. Validating emails before sending can help lower spam reports, as only active users receive your content.
Incorporating SMTP checks into your email strategy can make a difference. It keeps your campaigns cleaner, your reputation stronger, and your resources focused on the right recipients.
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