Compatibility

Full MX gateway and relay server compatibility with cPanel, Plesk, DirectAdmin and other hosting panels; Postfix, Exim, Mailcow, MailEnable, Exchange, Zimbra, iRedMail, Modoboa and dozens of free/commercial mail servers. Route inbound and outbound traffic through Pitbull in minutes.

34+

Platform integrations

3-5 min

MX setup time

Inbound

Inbound filtering

Outbound

Outbound protection

Illustrated setup guide

The same 4-step model applies to all mail servers and panels.

Pitbull MX Gateway and Relay flow

MX Gateway

1

MX Gateway

Point DNS MX to the Pitbull gateway. Inbound traffic passes through Rspamd filtering.

SPF · DKIM · DMARC

2

SPF · DKIM · DMARC

Add authentication records. Start with SPF include, DKIM signing and DMARC p=none.

Outbound Relay

3

Outbound Relay

Set Pitbull relay as smarthost / relayhost on your mail server.

NOC Verification

4

NOC Verification

Send a test email and monitor queue, rejects and delivery in the NOC panel.

Control Panels

Direct compatibility with popular hosting control panels.

cPanel

MX gateway and outbound smarthost integration on Exim-based cPanel servers.

Illustrated integration guide →

Plesk

Central filtering and quarantine layer on Plesk Postfix/Qmail environments.

Illustrated integration guide →

DirectAdmin

Zero-load antispam offload model on lightweight DirectAdmin servers.

Illustrated integration guide →

CyberPanel

MX gateway integration on OpenLiteSpeed/Postfix-based CyberPanel servers.

Illustrated integration guide →

HestiaCP

Antispam offload for lightweight hosting on HestiaCP Exim environments.

Illustrated integration guide →

ISPConfig

Centralized Postfix gateway for multi-server ISPConfig setups.

Illustrated integration guide →

Virtualmin

MX and relayhost configuration on Webmin/Virtualmin Postfix servers.

Illustrated integration guide →

aaPanel

Fast MX gateway setup on aaPanel Postfix hosting servers.

Illustrated integration guide →

Froxlor

Postfix gateway layer on open-source Froxlor ISP panels.

Illustrated integration guide →

InterWorx

Enterprise MX gateway for InterWorx cluster and reseller environments.

Illustrated integration guide →

Enhance

Postfix smarthost integration on the Enhance modern hosting platform.

Illustrated integration guide →

Mail Servers (MTA)

Free and commercial mail servers: Mailcow, MailEnable, Exchange, Zimbra, Postfix and more.

Postfix

Bare-metal Postfix integration via transport map and relayhost.

Illustrated integration guide →

Exim

ISP/hosting MTA support via Exim smarthost and ACL-based routing.

Illustrated integration guide →

Sendmail

Mailertable and smart_host relay integration on classic Sendmail MTA.

Illustrated integration guide →

OpenSMTPD

Relay via and MX inbound configuration with BSD-based OpenSMTPD.

Illustrated integration guide →

Qmail

Gateway integration via Qmail smtproutes and MX routing.

Illustrated integration guide →

Haraka

Outbound hook and relay configuration on Node.js-based Haraka MTA.

Illustrated integration guide →

Zimbra

Free / Commercial

Relay_host and MX gateway integration on Zimbra Postfix layer.

Illustrated integration guide →

hMailServer

Windows hMailServer SMTP relay route and inbound MX gateway.

Illustrated integration guide →

MDaemon

MDaemon Smart Host and gateway domain configuration.

Illustrated integration guide →

Kerio Connect

Kerio Connect SMTP relay server and inbound gateway setup.

Illustrated integration guide →

SmarterMail

SmarterMail outgoing gateway and smarthost relay configuration.

Illustrated integration guide →

Axigen

Axigen relay host and MX-based inbound/outbound gateway.

Illustrated integration guide →

IceWarp

IceWarp SMTP relay and domain gateway configuration.

Illustrated integration guide →

MailEnable

Free / Commercial

Windows MailEnable SMTP smart host and inbound MX gateway.

Illustrated integration guide →

Mailcow

Relayhost and MX gateway on Docker-based Mailcow (Postfix).

Illustrated integration guide →

iRedMail

Free / Commercial

Relayhost and MX integration on iRedMail Postfix/OpenLDAP.

Illustrated integration guide →

Modoboa

Gateway setup via Modoboa web UI and Postfix relayhost.

Illustrated integration guide →

Stalwart

Outbound relay and MX gateway on modern Stalwart Mail Server.

Illustrated integration guide →

Microsoft Exchange

On-prem Exchange send connector and MX gateway integration.

Illustrated integration guide →

CommuniGate Pro

CommuniGate Pro SMTP relay and inbound gateway configuration.

Illustrated integration guide →

Carbonio

Relay host integration on Zextras Carbonio Postfix layer.

Illustrated integration guide →

Cloud & Enterprise

Cloud and enterprise mail environments.

Microsoft 365

Additional security layer in front of hybrid and M365 — MX-based deployment.

Illustrated integration guide →

Google Workspace

Inbound filtering via Google Workspace MX routing.

Illustrated integration guide →

Automation & Billing

Billing and operations automation.

💳

WHMCS

Automated provisioning, billing and customer management integration.

Illustrated integration guide →

API & Webhook

Alert webhooks, tenant sync and operations automation.

Illustrated integration guide →

Setup in 5 Steps

Setup takes 3-5 minutes in most environments. DNS propagation may take additional time.

1 Point MX records to the Pitbull gateway address (priority 10).
2 Add Pitbull include to SPF — without breaking existing records.
3 Enable DKIM signing in the panel and add TXT to DNS.
4 Start DMARC at p=none and monitor reports.
5 Add Pitbull address to smarthost/relayhost for outbound.
6 Send a test email and verify traffic in the NOC panel.

Security Analysis Talk to Sales All Solutions →

Reach us: 0850 500 0 666

Products

Find detailed integration info on product pages.

Pitbull Secure Gateway → Advanced Threat & Quarantine → Outbound Filtering → Smarthost SMTP Relay →