Smtp

DNSBL of end-user IP ranges that should not send email directly to MX servers.

Managed cloud email security filtering spam, malware & phishing via 25+ engines.

On-prem email archiving for Linux/UNIX servers with policy mgmt & search.

Outbound spam filtering & transactional email API for hosting & SaaS.

Cloud SMTP relay for hosting providers to filter outbound spam & protect IP reputation.

cPanel/WHM plugin for provisioning MailChannels email security for hosting customers.

SMTP gateway that encrypts outbound email for HIPAA compliance.

HIPAA-compliant email encryption using TLS, Escrow, and PKI methods.

Free online tool to analyze SMTP TLS support for any domain's inbound email servers.

Managed business email service on MailEnable with security & no per-mailbox fees.

Email gateway that localizes personal data in emails to meet data residency laws.

Scriptable, container-ready MTA for secure, scalable email infrastructure.

Email list validation tool checking deliverability, syntax, and spam traps.

S/MIME certificates for end-to-end email encryption and signing.

Carrier-grade outbound spam & botnet detection solution for ISPs.

Free email server and proxy for MailStore email archiving solutions

Email server application with groupware functions for Microsoft Windows

Cloud-based transactional email delivery service with API integration

Email security gateway for enterprises protecting against threats and risks

IMAP-Honey is a honeypot tool for IMAP and SMTP protocols with support for logging to console or syslog.

A PoC tool for utilizing GPT3.5 in developing an SMTP honeypot.

A simple honeypot that collects credentials across various protocols

SMTP honeypot tool with configurable response messages, email storage, and automatic information extraction.

SMTP Honeypot with custom modules for different modes of operation.