lfr

lfr

Anonyfox
+
+

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About

BounceLens is a browser-based email list checker for marketers, newsletter publishers, online shops, sales teams, and developers. Users can paste addresses or check a CSV list for malformed syntax, domains that do not exist or have no mail service, likely domain typos, disposable addresses, duplicate entries—including Gmail dot and plus-tag variants—and role accounts such as info@ and sales@. The checker uses public DNS information to assess domain mail configuration; it does not contact recipient mail servers or confirm whether an individual mailbox exists, so acceptable results are labeled unconfirmed rather than verified. It can help teams identify addresses that may be invalid or risky before sending or storing email lists. The product is also offered through extensions and add-ons, a self-hosted HTTP API, an MCP server, and language libraries for incorporating the same checks into other workflows.

About

lfr is self-hosted mail-server and newsletter software packaged as a single Go binary for Linux and macOS servers. It lets developers, self-hosters, and small teams host mailboxes for their domains, manage aliases and forwarding, search and reply to messages, and configure domain mail records. Newsletter tools support double-opt-in signup lists, Markdown-based issues, hosted archives and signup websites, one-click unsubscribe, bounce and complaint handling, and delivery through a configurable SMTP relay when direct sending is unavailable. The command-line interface runs locally or over SSH, with setup and diagnostic commands for server, DNS, and mail delivery tasks. lfr is distributed under the MIT license; the software itself is free, while users arrange and pay for their own server and any optional relay service.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Supported
Linux Supported
Cloud Not Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Email marketers, newsletter senders, online shops, sales teams and developers who want to clean an email list before sending

Audience

Developers, self-hosters and small teams who want to run their own mail server and newsletters

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Not Supported

Screenshots and Videos

No images available

Screenshots and Videos

No images available

Pricing

Free
The email list checker is free to use, with no signup, credits, or stated daily limit.
Free Version Supported
Free Trial Not Supported

Pricing

$0
The software is free and MIT-licensed. Users provide their own server; optional SMTP relay services are billed separately by their providers.
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Not Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

BounceLens
Founded: 2026
India
bouncelens.com

Company Information

Anonyfox
Germany
lfr.email/

Alternatives

Alternatives

No Alternatives
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MailInput

MailInput

Devro LABS
Sealch

Sealch

Sealch Pro

Categories

Email Verification Supported

Categories

Mail Servers Supported

Integrations

Amazon SES Not Supported
Model Context Protocol (MCP) Supported
SMTP2GO Not Supported

Integrations

Amazon SES Supported
Model Context Protocol (MCP) Not Supported
SMTP2GO Supported
Claim BounceLens and update features and information
Claim BounceLens and update features and information
Claim lfr and update features and information
Claim lfr and update features and information