Receiving emails through the website or web application is an important feature and often the only way that web development company can get in touch with their customers. If you look back, how often do you receive an email from a potential customer with an invalid or incorrect email address? Of course, you can use advanced regular expression patterns to verify the format of the email address, but these patterns do not verify if the email address exists. This tutorial is about double email address validation, first, we verify the email address format and then we validate the email addresses with an API system in PHP.
You need a valid email address all the time, but sometimes additional control is necessary to achieve your goals. However, web development company use a second layer of email address validation to:
Mailboxlayer is a service of API layer, a company based in Vienna, Austria. They offer not only the email validation API but also API systems for currency conversion, PDF creation and many more. All your API services are based on a premium model, so you can use them for free if you don’t make so many API calls.
A free Mailboxlayer API account includes 250 credits per month. This might be enough for smaller sites, but only if you send only those addresses with a “good” email address format. For example, a regular expression test before sending the email address to the API endpoint.
In addition to verifying the format of the email address, Mailboxlayer is using different methods to verify your sent email address:
You can use the Mailboxlayer email validation API with any programming language that can analyze a JSON formatted data response. You may have noticed that the email validation service has provided a suggestion for email addresses hosted by popular email service providers. If you enter “firstname.lastname@example.org”, the response shows the suggestion “email@example.com” as a possible valid email address. Play a little with the example to see what kind of response you get for different entries. Also, note the “score” value, a value greater than 0.8 is a good value for email marketing campaigns. If you use the email addresses collected only for transactional emails, a value greater than 0.65 is acceptable.
We suggest rechecking the email addresses of your mailing list if your last campaign was sent more than 6 months ago. Our web development company do the same for our clients’ lists also with a small PHP script. We use the Mailboxlayer API for this job. Follow these steps to clean your mailing list:
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Source: Web Development Blog