HELOBeyond Code
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About
HELO is a desktop application designed to simplify email testing and debugging for web developers by capturing and analyzing outgoing emails generated by applications during development. Instead of sending emails to real recipients, HELO exposes a local SMTP server that intercepts outgoing messages and displays them inside the application, allowing developers to inspect and verify them before deployment. This approach helps prevent common problems such as broken links, missing images, formatting errors, and other issues that often appear in production emails. It provides detailed debug views that show the email in multiple formats, including HTML rendering, plain text, raw source code, and full message headers, giving developers a complete understanding of how the message is structured. Automated validation tools check links within the email to confirm they return valid HTTP responses, reducing the risk of sending emails with invalid or broken URLs.
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About
Get unlimited email addresses and mailboxes for automating end-to-end tests with our simple APIs. Email verifications, passwordless signins, etc. Are they triggering when expected? Are emails reaching the inbox? Never spam real customers by mistake - send your test emails to {namespace}.{tag}@inbox.testmail.app. Signup to get your {namespace}. The {tag} can be anything: each tag makes a separate email, so you can create unlimited real email addresses and mailboxes on the fly by simply changing the tag! Use any HTTP or GraphQL client of your choice in any language or environment including CI/CD pipelines. Take it further with awesome features like advanced search with wildcard match, "live" queries (waiting for new emails), sorting, pagination, attachments, SpamAssassin reports, and more. Together you can create separate namespaces (and mailboxes) for each project, securely provision and retrieve API keys, share test emails, monitor usage, and manage team membership.
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Audience
Web developers building applications that send transactional or automated emails and need a local tool to test, debug, and validate those emails before deployment
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Audience
Email professionals
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Support
Phone Support
24/7 Live Support
Online
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Support
Phone Support
24/7 Live Support
Online
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API
Offers API
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API
Offers API
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Pricing
$49 per month
Free Version
Free Trial
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Pricing
$9 per month
Free Version
Free Trial
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Reviews/
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Reviews/
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Training
Documentation
Webinars
Live Online
In Person
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Training
Documentation
Webinars
Live Online
In Person
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Company InformationBeyond Code
Founded: 2017
Germany
usehelo.com
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Company Informationtestmail.app
Canada
testmail.app/
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