![]() 250 - requested action OK and completed.221 - goodbye - service closing transmission.The second digit represents the category:īelow are some common status codes together with their meaning: Important parts of the server SMTP response are so-called Basic status codes and Enhanced status codes.īasic status codes contain 3 digits, where the first digit represents whether the response is: While proceeding with this method, it’s important to properly recognize the responses of an email server. Learn more atĢ21 2.0.0 closing connection l26si4867318ljg.18 - gsmtp Please tryĥ50-5.1.1 double-checking the recipient's email address for typos orĥ50-5.1.1 unnecessary spaces. Here is how the communication would look like for a deliverable email address:ĥ50-5.1.1 The email account that you tried to reach does not exist. Finally, after the response code, type rcpt to:.Next, it’s time to check the email address. Please note that there’s only one L in the command. On Windows, the command for this is telnet.Pick one of them, then connect to it using Telnet.Look up the mail server using the command nslookup - type-mx followed by the email domain name. Below are the steps needed to verify email addresses by pinging the email server: To perform this method, you need a tool like Telnet on Windows or PuTTY or nc (netcat) on macOS. Actually, this method is slow, cumbersome, and risky for your infrastructure however, it is quite accurate. Ping the server is a technical method to verify email addresses without sending an email. If you notice email addresses with incorrect syntax, you should remove them from your email list or create a suppression list, so that you won’t accidentally send them. Besides, check for typographical errors, such as or which can cause your emails to bounce back. Any other format than this email syntax is faulty and will most likely result in a bounce. You must check to ensure that your recipient’s email address adheres to the required syntax. (used to separate parts of domain labels, such as subdomains, main domain, and top-level domain) Hyphen - (however, it should not be placed at the beginning or ending of the domain part).The domain part is typically the same as the business domain, such as or the email service provider, such as It can include: (however, it should not be placed at the beginning or ending of the local part, and it shouldn’t be next to another dot) Special characters, such as ! # $ % ^ & ’ * + - / = ?.Uppercase and lowercase Latin letters (A-Z, a-z).The local part can be maximum 64 characters long and can include: They are separated by a character and follow the format of For example, if we have an email address of, the “abc” is considered the local part, and the “xyz” is considered the domain. Valid email addresses consist of 2 parts: a local part (i.e., username) and a domain. ![]() In fact, they can be checked and modified manually. One of the most popular problems with email addresses is typographical and syntax errors. We’ve attempted to provide simplified solutions to technical difficulties, so let’s see what they are. In this section, we will show you 6 ways to do so. ![]() In this case, verification of an email address without sending an actual email is possible. 6 ways to verify an email address without sending an emailĪs we got to know, sending emails to verify email addresses can harm your domain reputation. With better deliverability, you will see a better open and response rate. Not only will you waste your time on bounced emails, but the messages you send to valid addresses won’t be delivered as successfully.īy taking an extra step to verify an email address before hitting the “Send” button, you will improve your deliverability. The more your emails get bounced, the more likely the messages coming from your inbox will be marked as spam. Why should you verify an email address before actually sending?ĭelivering 500 emails to verified email addresses is actually much better than sending 1,000 messages to unverified emails.Ĭhances are, a significant percentage of those 1,000 emails will bounce. In this guide, let’s learn how and why it’s so valuable to do so. You can actually verify email addresses without sending emails to all of them. However, if your email list includes a few hundred or even a thousand contacts, this is really time and resource-consuming. ![]() The idea is simple - if the email hard bounced, the recipient doesn’t exist. For years, it has become a common practice among marketers to verify the validity of an email address before hitting the “Send” button.
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