Work Mail and Personal Mail

Time: an evening to separate them, ten minutes on the day you leave. Repeat: at every job change.

Treat the work mailbox as equipment you borrowed

Work from the assumption that the work mailbox belongs to your employer, not to you. They pay for it, they administer it, they can read it, and on your last day they take it back with everything inside.

This is not a warning about a bad employer. It is how corporate mail is built: the domain is company property, the accounts are provisioned by the company, and the administrators hold the keys by design. A friendly employer with a good culture has exactly the same technical position as an unfriendly one. What differs is what they choose to do, and you will not be told either way.

Know what an administrator can actually see

Assume anything in the mailbox can be read without your involvement. An administrator with normal privileges can open messages, restore deleted ones from retention storage, see when and from where you signed in, and inspect any forwarding or filter rules you have set.

Retention makes the reach longer than people expect. Many organisations keep a copy of everything for a period defined by policy or regulation, which means deleting a message from your view does not remove it from theirs. Compliance tools can search across all mailboxes at once, and in a dispute or investigation that search is exactly what happens.

Whether they need a reason to look at your mailbox depends on where you work and what you agreed to when you were hired. Rules on employee monitoring differ by country and some places require notice or a stated purpose. None of that changes the capability, and the capability is what you should plan around.

Move your personal accounts off the work address now

Go through your personal accounts and change any that are registered to your work address. This is the most expensive habit in this article, because those accounts do not stop existing when the mailbox does.

The costly ones are predictable: shops with saved cards and order history, subscriptions that renew automatically, anything from a bank or an insurer, loyalty and travel programmes with points in them, and every account that lists the work address as its recovery contact. The day the mailbox is disabled, all of those lose their route back to you at once, and support at a shop will not accept "I used to work there" as proof of identity.

If you cannot remember which accounts are affected, do not guess. Search the work mailbox for welcome and receipt messages, which is the fastest way to see what registered there; the full method is in finding every account tied to an address.

Do the move in this order

Change the recovery contacts first, then money, then everything else. The order is the same one that applies to any address change, and the reasoning behind it is set out in changing your email address.

There is one addition specific to work. Do it while you still have the job. Every step needs you to receive a confirmation code in the work mailbox, and once that mailbox is disabled, most of these changes become impossible rather than merely awkward. People who wait until the resignation is announced discover this during their notice period, which is a bad week to be doing it.

While you are in the settings, look at what you have connected to the work mailbox over the years: calendar apps, note tools, mail clients on personal phones. Some of those grants outlive the account and some do not, and the tidy version is to review them deliberately rather than find out. The apps that can read your mail covers where each provider keeps that list.

Do not forward work mail to your personal mailbox

Leave automatic forwarding off, even for convenience, and even if the setting is available to you. In most organisations it breaches the acceptable use policy you signed, in regulated industries it can breach the law, and it is the single easiest thing for an administrator to notice, because forwarding rules are visible in the admin console and are actively monitored in many companies.

The awkwardness is real: you want to answer something from your phone, and the sanctioned route is slower. Use the sanctioned route anyway. Companies provide mobile mail access precisely so that forwarding is unnecessary, and if yours does not, ask for it rather than build your own.

The same applies to bulk copying the mailbox before you leave. It looks like backing up your own work and it reads, to anyone reviewing it later, like exporting company data.

Prepare the leaving day before you need it

Decide in advance what you will want from the mailbox and ask for it properly. On the day access is revoked, usually within minutes of the conversation, everything in there stops being reachable.

What is normally uncontroversial to take: your own contact list of external people you know personally, references and recommendations written about you, and anything you can point to as personal correspondence. What is not yours: client lists, project files, internal documents, message history and anything covered by confidentiality. The line is roughly between things about you and things about the business.

A correct request is short, written, and made before you leave: ask your manager or HR for permission to export specific items, name them, and keep the reply. That reply is what makes a later question about it a non-issue. Asking is also the fastest route to a yes, since most of what people want is not contentious once it is asked for out loud.

Set an out of office and share your personal contact details with the external people you actually want to stay in touch with, in the last week rather than the last hour.

Keep work mail out of your personal mailbox as well

Resist the other direction too: do not accumulate work correspondence in your personal account. The risk here is yours, not the company's.

If there is ever a dispute, an audit or a legal process, a personal mailbox containing company material can be pulled into it, and the scope of what gets examined is not decided by you. It also confuses your own life: the archive you keep for yourself should be about you, which matters more than it sounds when somebody else eventually has to make sense of your accounts, as in your mailbox after you are gone.

The clean arrangement is two mailboxes with a clear boundary, which is one of the few genuinely justified reasons to run more than one. What each additional mailbox costs to maintain is in how many email accounts you need. And for the third category, the one-off signups that belong to neither life, a short-lived inbox of its own keeps both of them out of it.

Contractors: the client's address dies with the contract

Refuse a client domain address as your primary identity if you are a contractor or freelancer. It is convenient during the engagement and it disappears the day the contract ends, along with any account you registered with it.

Use your own address for everything that is yours, including tools you pay for, professional profiles and invoicing. Where a client insists you use their mailbox for internal communication, use it for exactly that and nothing else. The address is theirs, the account is theirs, and the notice you get before it stops working is however long the offboarding email takes to reach you.

The checklist

• Assume everything in the work mailbox is readable and retained.
• Move personal accounts off the work address while you still have access to it.
• Change recovery contacts first, then anything with money attached.
• Leave forwarding off, and ask in writing for anything you want to take with you.
• Keep company mail out of your personal account for your own protection.
• Never let a client or employer domain be the address your own life depends on.