SMTP Diag Tool
SMTP Diag Tool is a free, open-source Windows application used to diagnose issues with sending and receiving emails. It can test SMTP servers, validate email addresses, verify DNS records, and check for common email delivery problems.
smtp
email
diagnostic
troubleshooting
SMTP Diag Tool: Diagnose Email Sending Issues
A free, open-source Windows application to test SMTP servers, validate email addresses, verify DNS records, and check for common email delivery problems.
What is SMTP Diag Tool?
SMTP Diag Tool is a free, open-source Windows application designed to help diagnose issues with sending and receiving emails. It provides a suite of tools to test various aspects of the email delivery process and identify possible problems.
Key features of SMTP Diag Tool include:
- SMTP server testing - Validate connections to SMTP servers, check server responses, and confirm emails can be sent and received properly.
- Email address verification - Verify the validity of email addresses and domains.
- DNS record checks - Check that DNS MX and A records are configured correctly for a domain.
- Email diagnostic tests - Check for issues like greylisting, spam filtering, mailbox full errors, and more.
- Connection logging - Log SMTP connections for troubleshooting.
- Custom email headers - Add custom headers to test messages to check handling.
- Portable application - Runs on any Windows machine without needing installation.
Overall, SMTP Diag Tool is a useful utility for diagnosing email delivery issues, validating SMTP servers, and troubleshooting problems that prevent emails from being sent and received correctly.
SMTP Diag Tool Features
Features
- Test SMTP servers
- Validate email addresses
- Verify DNS records
- Check for common email delivery issues
Pricing
- Free
- Open Source
Pros
Free and open source
Easy to use interface
Provides detailed diagnostic information
Can test both sending and receiving emails
Lightweight and fast
Cons
Limited to testing SMTP only
No support for other protocols like IMAP or POP3
May not catch every potential email delivery issue
Basic feature set compared to paid tools
The Best SMTP Diag Tool Alternatives
Top Network & Admin and Email Tools and other similar apps like SMTP Diag Tool
Here are some alternatives to SMTP Diag Tool:
Suggest an alternative ❐
MxToolBox
MxToolBox is a popular network administration and troubleshooting tool suite. It offers over 30 different tools to test, measure, and analyze critical internet infrastructure and protocols including:Email - Check DNS records, test mail servers, analyze spam protection and deliverabilityDNS - Lookup records, check DNS propagation, analyze DNS healthNetwork Infrastructure -...
Pingdom
Pingdom is a popular website monitoring service used to track uptime, performance, and speed of websites and web applications. It works by checking websites periodically from locations around the world to test response time and uptime.Key features of Pingdom include:Uptime monitoring - Get alerts if your site goes downPage speed...
Pingbreak
Pingbreak is a productivity software designed for remote teams and distributed workers. It is used to help improve focus and increase productivity by limiting access to distracting websites during selected time periods.Here are some key features of Pingbreak:Allows users to block distracting websites like social media, news, and entertainment sites...
IntoDNS
intoDNS is a free online domain research tool that provides a DNS report and checks to help identify potential issues or misconfigurations with a domain's DNS records. Some key features of intoDNS include:DNS record validation - Checks that all DNS records like NS, MX, A, CNAME etc. are properly configured.Mail...
Uptime.com
Uptime.com is a comprehensive website and application monitoring service used by businesses to track uptime and performance. It provides a variety of monitoring methods including HTTP, HTTPS, ping, automated transactions, and advanced monitoring to simulate user journeys.Key features of Uptime.com include:Uptime monitoring with 5 minute check intervalsInstant alerts via email,...
Dnsstuff
Dnsstuff is a popular provider of free online DNS and network tools that help with network troubleshooting, analysis and monitoring. Some of the key tools offered by Dnsstuff include:DNS Report - Provides detailed DNS record information about a domain including record types, TTL, associated IPs and more.DNS Health Check -...
Upzilla
Upzilla is an open-source, web-based defect tracking system that provides an alternative to Bugzilla. It allows development teams to track software bugs, issues, and feature requests throughout the development process.Some key features of Upzilla include:Crowdsourced voting allows users to vote on bug priorityCustomizable fields, views, and workflowsAttach files and screenshots...
Netthrob
Netthrob is an open-source web server software designed for the Windows operating system. It allows users to set up a personal or business website on their own computer without needing to pay for web hosting.Some of the key features of Netthrob include:Lightweight and easy to install, taking up minimal system...
Silent Down
Silent Down is a free, open source BitTorrent client for Windows operating systems. Originally based on the BitTornado codebase, Silent Down aims to provide a lightweight yet full-featured torrent downloading experience.Some key features of Silent Down include:A clean and intuitive UI focused on simplicity over advanced controlsQueuing and prioritizing of...
