Diagnose email server issues and fix email delivery problems. ZeroBounce’s Email Server Testerⓘ Tool performs 100+ server health checks, including headers, DNS, SMTP settings, and more.
Try it now - get one free monthly email server healthⓘ check!
Take control of your email campaigns and fix email delivery problems fast. The email server testⓘ identifies every possible email server performance and configuration issue impacting your campaign and server performance. If you’ve cleaned your list of contacts and are still seeing undelivered emails, your setup may be the culprit.
Optimize SMTP settings, analyze headers, check email authenticationⓘ alignment and more.
Return path
DKIM signature
DomainKey signature
Message ID
X-AntiAbuse
and more
RFC 2045 (MIME)
RFC 4406 (Sender ID)
RFC 4408 (SPF)
RFC 4871 (DKIM)
RFC 5322 (Message Format)
and more
MX records
rDNS PTR records
SPF records
Last sending domain
A records
and more
Connection status
Supported extensions
SMTP banner rDNS
SSL Protocol
SSL Cipher
and more
RUA check
RUF check
ADKIM test
ASPF test
DKIM test
and more
SPF alignment
DKIM alignment
DMARC check
Author Domain Signing Policy
DomainKeys check
and more
Get a full email server testⓘ now
Are you cleaning your list with email validationⓘ but still experiencing email delivery problems? The issue may be your email server configuration.
The email server testerⓘ makes it simple for anyone to get an email server healthⓘ check. We perform SMTP relay testing, email server compliance checks, and dozens of additional tests for you. Then, we provide actionable solutions to help you improve email deliverabilityⓘ and ensure your emails are reaching their destination.
When you open the email server testerⓘ tool, we will assign you an email address. Send an email to this custom address from the mail server you need to test.
Within minutes, obtain your email server configuration check and email deliverabilityⓘ testing results.
Your email server diagnostics will help you pinpoint warnings and critical settings to fix, enhancing email deliverabilityⓘ.
Get a free email server testⓘ every month
A variety of factors can cause your company’s email delivery efforts to go awry. The culprit could be a failure to optimize SMTP settings, DNS records, MX records, email ports, and more.
Pinpointing the email server issue is as simple as sending an email from your domain with the email server testⓘ. Then, we will locate the setting or record the issue and provide you with the fix.
Get a free email server testⓘ every month
Email server tests are essential to improve email server performance and boost your inbox placement.
But, even if your test looks clean, here are some additional factors to consider.
Clean your email list — Even a well-configured email server can’t deliver emails to invalid addresses.
Use an email verifier to check your contacts and eliminate any that are invalid or high-risk.
Check email server blacklists — If email delivery issues persist, your domain may be on an email blacklist. Try a Blacklist Monitor to compare your domain against 200+ blacklists, and get alerted any time you’re listed.
Secure your email domain — Email security has always been essential, but now it’s a requirement. Creating email authentication records for SPF, DKIM, or DMARC is free. However, using a tool like DMARC Monitor simplifies the task of creating and enabling records while also providing automated reporting for any suspicious or malicious activity.
Test your email content — When everything else is configured correctly, your email content is the answer. Many mail servers include built-in spam filters that may block your emails based on certain words, phrases, or images in your email. Try an inbox placement tester to compare your email content against popular mail providers before sending.
Don’t lose out on email marketing sales. Use the easy, 3-step email server testerⓘ tool and fix email delivery problems like an expert.
Create your free ZeroBounce account - gain access to monthly benefits:
100 credits
Email Validation, Activity Data, Email Scoring
10 Email
Finder Queries
1 Blacklist
Monitor
1 Inbox
Placement Test
1 Email
Server Test
An email server is a communications system that manages how you send and receive emails. There are two primary types of email servers: the outgoing server (interchangeable with Simple Mail Transfer Protocol or SMTP) and the incoming/receiving mail server. Both servers/protocols work together to successfully move a message from sender to receiver.
Get one free inbox placement testⓘ monthly - plus more!
