Hardware Specifications

portMTA supports both physical and virtual infrastructures and is also operating system independent. It can be installed on Windows or Linux Servers. The hardware specifications change according to send/rate requirements of yours.

Each portMTA instance is stackable and there is no hard limit on the number of stacked layers. The recommended hardware specifications are depicted below for tested send/rates.

Every Industry has their own priorities

portMTA features the following key functionalities that are critical for different business verticals and their requirements

Easy Integration with complex backend systems

Simple API calls / Common Queue Push & Pull Methods

Secure Messaging Infrastructure

Each message is encrypted in the queues, on the disks and even in the cache memory

Multi-channel Communication

portMTA not only supports e-mail but also SMS, web and mobile push messages

Segregated Message Streams

Message streams separated according to type, source and even its content and can be relayed from dedicated VMTAs and IP addresses (Marketing Messages, Transactional Messages with Personal Identifiable Information

High Availability

portMTAs work with pairs in active/active mode behind a loadbalancer


No Hard Limits, send rates from 100k msg/hour up to 50mn msg/hour

Auto IP Warm-Up

Automatic warm up algorithms for new IP addresses per VMTA instance

Relay Throttling

Ability to set the relay speed per send queue

Backing-off Policies

Dynamic policies adjusting relay speed & volume according to ESP feedbacks

Detailed Reporting Features

Open/Click reports, Reporting by OS/Device both for bulk and transactional messages