The Linux Box Corporation's (www.linuxbox.com) first commercial software product, an advanced email archiving, retrieval and reporting system, has gone live in a community edition and is available for free download at www.enkive.org.
Does the new Email Archiving feature make the archived emails tamper-proof? This is a needed component for compliance related requirements so someone is not able to go into old emails and change anything.
Our company uses Google Apps for email. We have a vender that I cannot receive email from when they send to my email address specifically (they can send to another account on my domain). Their email system is by Rackspace (webmail). The email is not going to spam, nor is getting filtered out by any rules.
Having your email up in the cloud is very convenient, until your Internet connection is down or email provider is having technical issues. In situations like these, having a searchable backup of all your emails which you can access locally can be a real life-saver.