Name: NioSmtpClient
Owner: HubSpot
Description: Smtp Client based on Netty
Created: 2017-03-02 15:56:20.0
Updated: 2018-03-28 17:31:53.0
Pushed: 2018-03-28 17:32:54.0
Homepage:
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Size: 649
Language: Java
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README
NioSmtpClient 
High performance SMTP client in Java based on Netty. This client is well tested and heavily used at HubSpot.
Features
- High performance, designed to handle many concurrent connections
- Supports TLS, pipelining, chunking,
SIZE, SMTPUTF8, and other ESMTP RFCs
- Send from specific IP addresses
- Optionally keeps connections alive to send subsequent emails
- Parses the
EHLO response and chooses the most-efficient sending method
- Interceptor support to modify or instrument commands
- Comprehensive unit and integration tests
Dependencies
This project depends on Java8, Netty, and Guava.
Java Docs
See http://github.hubspot.com/NioSmtpClient/1.0.0/
Notes For Developers
- NEVER execute blocking commands on an eventloop thread (i.e.
CountDownLatch.await or Future.get)
- Calls out to unknown functions (i.e. callbacks or event listeners) should always be done on isolated thread pools.
- Slow but not necessarily blocking operations should also be avoided
- Attempt to avoid doing long running tasks on event loop threads
- Use
new as sparingly as possible to avoid creating garbage:
- Share objects when possible
- Use netty bytebuf allocators when possible
- Use netty recyclers for objects that can be recycled.
License
Apache 2.0
