Email backup or archiving: what is the difference?
Both keep old email, so people mix them up. The trouble starts on the day the tool you paid for cannot do what you need.
The two tools answer different requests. Archiving is for something like “find every email with this supplier between March and June, and prove none of it was changed”. Backup is for “get back what was in this mailbox before someone emptied it”.
Both needs are real. They are usually bought by different people for different reasons, and a tool that claims to do both tends to be weak at one of them.
What an archiving tool is for
An archiving tool records messages as they arrive, or on a schedule, in a log that nobody can edit, the tool included. You set retention periods, and you run searches when a legal request comes in. The whole product is designed around compliance.
That is why archiving products come with legal holds, exports for lawyers and audit trails. They also tend to cost more, and most of them cannot put a folder back where it was in the mailbox, because they were never built to do that.
What a backup is for
A backup keeps a copy of your mailboxes so you can get back what was lost. What matters is how recent the copy is, how quickly you can find what you need, and whether you can pull out a single message without touching anything else.
It also keeps the mailbox as it was organised, folders included, which an archive does not always do.
- Can you get back a single message without restoring the whole mailbox?
- Does it keep deleted messages, and for how long?
- Can you open the export without the tool, in a standard format?
Backups and legal obligations
A backup has no value as legal evidence. If you need to prove years later that a message was not altered, to a court or a regulator, you need an archiving product built for that, with qualified timestamping where the law requires it.
The opposite mistake happens too: a company buys an archiving product and assumes its mailboxes are backed up. When a folder disappears, the archive can show you what was in it, but it cannot put it back in the mailbox.
Before you buy, work out whether you need to prove what was said or to get back what was lost. That tells you which tool you need.
Who needs what
Regulated businesses, listed companies and firms with a legal retention obligation need both, and the archive is usually required of them. A twenty-person company with an accountant, a sales inbox and a manager who deletes email a little too quickly mostly needs a backup. An archiving product would cost them a lot for a risk they do not really have.
istorel is a backup tool. It keeps deleted messages and lets you search for them and download them as .eml files, a standard format any mail app can open. Restoring straight into the mailbox is in development. istorel does not provide legal proof, and we say so on the pages where the question comes up.