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Postcoder checks and validates email addresses in real-time as soon as they're typed into your form. Block incorrect or fraudulent signups, and capture real and deliverable email addresses from genuine customers.
Illustration showing Postcoder validating an email address, including the validation result, score and email address checked.
Postcoder email validation performs multiple checks to confirm whether an email address can receive email.
Animated demo showing an email address being entered, validated and accepted during checkout.
"1 in 3 people give a fake email address at least some of the time."
Source: Verve Research
Postcoder instantly checks if email addresses are valid and able to receive messages.
Postcoder suggests alternative spellings for well-known email domains.
Postcoder flags disposable email addresses (DEAs) and catch-all domains.
Eliminate fake, invalid or temporary email addresses from being used to create bogus accounts.
Avoid losing leads or customers at registration due to accidental typos in their email address.
Ensure your customers get the emails they want from you by validating their email address.
Don't make your customers type their email address twice. Validation helps them complete your form faster.
Enhance your sender reputation and improve deliverability rates by eliminating hard bounces.
Decrease admin time spent following up with customers who missed your important email.
Postcoder and its team of address and technology specialists meet the needs of high-demand applications and rapidly growing businesses.
Built on quality management best practices you can trust.
Seamlessly handles enterprise volumes and traffic spikes.
Designed for secure, privacy-first data handling.
Proven reliability to keep your integrations running smoothly.
Our engineers are on standby 24/7 to respond to service disruptions.
Fast, reliable API performance at all times, even under load.
Connect easily with your existing tech stack.
Email validation that checks syntax, mail servers and deliverability in real time.
Personalised setup and best-practice guidance.
Smooth transition from legacy systems or providers.
Get help via chat, email or phone - at no extra cost.
Businesses rate Postcoder 4.7 stars out of 5 on the world's most trusted software marketplace.
"Having a more simplified checkout page with the help of Postcoder has had two major benefits to our business. Faster checkouts by customers who haven't had to type in their full address, a much simpler customer journey and a major reduction in data errors; where we saw a big drop in incorrect details entered."Alex Woods Digital Marketing Executive / Victorian Plumbing
"We picked Postcoder because the API is simple to use and it supports many countries which we want to scale out to."David Annez Head of Engineering / loveholidays
"The reason we like Postcoder is that the rooftop lat/long coordinates have proven to be far more accurate than any other service and Postcoder has hugely increased our successful delivery rates."Laura Bailey E-commerce Product Manager / Pasta Evangelists
"Postcoder offers a seamless integration with our services. It is very popular with our customers."James Gutterson Commercial Manager / Signicat
"Postcoder has been great; there has been a noticeable quality increase in our campaigns. In some the pickup rate went from 30% to 60-70% and our appointment ratings for a campaign went from a 15% average to 40% for one client!"Daniel Jones IT Technician / Lead Pronto
"Postcoder is a single API that provides all the features we need... Rather than integrate several APIs, we only had to integrate one."Carl Horn Head of Digital Servicing & Customer Transformation / Capquest
"Postcoder ensures that all the address data, the mobile number and the email addresses that our customers give us are correct. It really speeds up the process for our customers."Julie Taylor Operations Director / Barrhead Travel
