E-mail archiving is the process of systematically recording and saving copies of e-mail correspondence for records keeping and documentation purposes.

US courts have issued guidelines on what is called 'e-discovery' or exchanging information using electronic means in legal proceedings. The American Bar Association has, in turn, warned lawyers that e-discovery apparently covers all means of electronic communications – including storage media, personal computers, laptops, PDAs, mobile phones, and so on.

Aside from these sources of information, companies must be prepared to show that their records have not been tampered with. In the same way, they should be able to prove – if needed – that their opponent's records have been tampered with.

The legal requirements straddle into practical issues. Tracing an email trail (for litigation purposes, for example) often results in time spent and people 'dedicated' to a single task – searching through storage media, checking and counter-checking veracity and accuracy of data, and in some cases attempting recovery of information that has been deleted – all under the pressure of heavy penalties in the event of failure.