NitroMTA
NitroMTA by Nitrosend is an open-source mail delivery engine designed for self-hosting. This powerful tool is compatible with the Amazon SES v2 API, allowing users to maintain their existing SES code while simply changing the endpoint to send emails from their own IP addresses and domains. NitroMTA features a unique IP warming process that gradually warms up new IPs on a receiver-by-receiver basis, ensuring optimal deliverability. Additionally, the nitromta doctor tool meticulously checks every DNS record that a receiver accesses, enhancing reliability. In benchmark tests conducted on the same AWS bare-metal server, NitroMTA demonstrated impressive performance, achieving 3.16 times the throughput of KumoMTA and 4.11 times that of Postfix, all while ensuring that every message was stored on disk prior to acceptance. Built using Rust and licensed under Apache-2.0, NitroMTA is an excellent choice for those seeking a robust and efficient mail delivery solution.
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