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features
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support

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Description

SMTP Senpai, offered by MailSenpai, serves as the SMTP relay for emails generated by your applications, websites, and tools, handling everything from sign-ups and password resets to order confirmations, notifications, and contact forms. You can connect using standard SMTP (port 2525 or 587 with STARTTLS), a REST API that provides JSON responses, or a dedicated form endpoint suitable for web forms, even on static sites. All outgoing emails are DKIM-signed using your own domain, for which we supply the necessary DNS records and verify them on your behalf. Automatically, we suppress bounced addresses, maintain a 90-day log of all sent emails, and provide you with a comprehensive weekly report. Rather than suspending your account upon exceeding a certain threshold, we issue a warning and guide you on what needs to be addressed. Our servers and data operations are based in the EU, and we offer support in both Italian and English through tickets and email. Try us out with a 14-day free trial that requires a card for registration (you can cancel anytime), and then continue with plans starting at €12.90 per month for up to 10,000 emails on an annual subscription. This service ensures reliable email delivery while offering flexibility and support for your communication needs.

Description

lfr is an all-in-one mail server and newsletter solution designed as a single Go binary that operates on both Linux and macOS platforms. This tool empowers developers, self-hosters, and small teams to easily create and manage mailboxes for their domains, handle aliases and forwarding, and efficiently search and respond to emails while also allowing for domain mail record configuration. Its newsletter features include customizable double-opt-in signup lists, Markdown-based content for issues, hosted archives along with signup websites, an easy one-click unsubscribe option, and effective handling of bounces and complaints, all facilitated through a configurable SMTP relay if direct sending isn't possible. The command-line interface can be accessed either locally or through SSH, providing functionality for setup and diagnostics related to server, DNS, and mail delivery. lfr is made available under the MIT license, meaning that while the software itself is free, users are responsible for managing and financing their own server and any optional relay services they choose to utilize. With its robust capabilities and user-friendly approach, lfr stands out as an ideal choice for those looking to maintain control over their email and newsletter operations.

API Access

Has API Yes 

API Access

Has API No 

Screenshots View All

Screenshots View All

No images available

Integrations

Amazon SES No 
Django Yes 
Laravel Yes 
Magento Yes 
Node.js Yes 
PrestaShop Yes 
SMTP2GO No 
Supabase Yes 
WooCommerce Yes 
WordPress Yes 
n8n Yes 

Integrations

Amazon SES Yes 
Django No 
Laravel No 
Magento No 
Node.js No 
PrestaShop No 
SMTP2GO Yes 
Supabase No 
WooCommerce No 
WordPress No 
n8n No 

Pricing Details

Free
Permanent free plan: 5,000 emails per calendar month, up to 200 per day and 30 in the preceding hour; one verified sender domain; 7-day sending logs; no card or expiry. Paid annual plans start at EUR 12.90/month plus VAT for 10,000 emails/month, with 90-day sending logs. The free plan does not automatically become a paid subscription.
Free Trial No 
Free Version Yes 

Pricing Details

$0
The software is free and MIT-licensed. Users provide their own server; optional SMTP relay services are billed separately by their providers.
Free Trial No 
Free Version Yes 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based No 
On-Premises Yes 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac Yes 
Linux Yes 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

MailSenpai

Founded

2016

Country

Italy

Website

en.mailsenpai.com/smtp-senpai/

Vendor Details

Company Name

Anonyfox

Country

Germany

Website

lfr.email/

Product Features

Email Deliverability

DMARC Analytics No 
Deliverability Alerts No 
Deliverability Reporting No 
Email Address Verification No 
Email Content Testing No 
Email Previewing No 
IP Blacklist Monitoring No 
Inbox Placement Testing No 
Reputation Reporting No 

Transactional Email

SMTP Senpai facilitates the delivery of transactional emails for applications, websites, e-commerce platforms, and business software, handling tasks such as user registrations, password recovery, order confirmations, invoices, alerts, and contact submissions. It operates using standard SMTP on ports 2525 or 587, a RESTful API, or a form submission endpoint. The service includes DKIM setup for your domain, a 90-day email activity log, automatic management of bounces and complaints, with all servers and data housed in the EU.

A/B Testing No 
Contact Database No 
Dynamic Content No 
Email Monitoring Yes 
Mailing List Management No 
Reporting/Analytics Yes 
Spam Check No 
Template Management No 

Product Features

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Alternatives

No Alternatives
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