If you run a business, there’s a good chance you have a collection of other people’s email addresses sitting somewhere in your inbox, CRM, website, booking system or email marketing platform. Knowing how to protect client email addresses is an important part of looking after the personal information your customers have trusted you with.
They might belong to your clients, customers, suppliers, newsletter subscribers or people who have simply filled out a contact form on your website.
It’s easy to forget that an email address is personal information. Once someone has trusted you with their details, there is a responsibility to handle that information properly, rather than treating your contact list as a handy little database you can use however you like.
This is particularly important for small businesses, where one person might be managing the website, enquiries, email marketing, customer service and everything else in between. You don’t necessarily have a dedicated IT or privacy team checking what happens to every email address.
So, here are five things you should not do with your clients’ email addresses.
1. Don’t add them to your newsletter without permission
This one seems obvious, but it happens all the time.
Someone contacts you about a service, buys something from you, downloads something from your website or becomes a client, and suddenly their email address finds its way onto your regular marketing list.
The problem is that contacting someone about the thing they originally asked you about is not necessarily the same as giving you permission to send them ongoing marketing emails.
If someone fills out your contact form asking for a quote for a website, for example, you can obviously reply to their enquiry. That doesn’t automatically mean they have agreed to receive your weekly newsletter, promotional emails and updates about your latest offer.
Your email marketing list should have its own clear opt-in process, so people know what they are signing up for.
And make sure the wording actually tells people what they’re agreeing to. A tiny checkbox buried underneath a mountain of legal text isn’t exactly a shining example of informed consent.
2. Don’t use their email address for something completely unrelated
It can be tempting to think, “Well, I already have their email address, so I may as well use it.”
Please don’t.
If a customer gives you their email address so you can send an invoice, you shouldn’t then decide to use it for an entirely different purpose just because it’s sitting there in your system.
Think about why you collected the information in the first place.
If someone gives you their details so you can contact them about their website project, that’s the context in which they would reasonably expect you to use those details. If you suddenly start sending them unrelated promotions, adding them to another database or passing their details to someone else, you’re moving well outside that original expectation.
This is one of those situations where common sense is actually quite useful. If you would be surprised to receive the email you’re about to send, there’s a good chance your client might be surprised too.
3. Don’t put a whole list of clients in the CC field
You know the one. You receive an email from a business and can suddenly see a long list of other customers’ email addresses sitting there in the CC field.
Not only is it unnecessary, you’ve just potentially disclosed those customers’ contact details to each other.
If you’re sending an email to multiple people who don’t know each other, use BCC instead of CC, or better still, use a proper email marketing platform if you’re sending marketing or bulk communications.
And if you’re sending regular client emails manually, take a second to check the recipient field before hitting send. It is remarkably easy to accidentally expose a whole list of addresses when you’re working quickly.
It doesn’t happen as often as it used to, but one little email mistake can turn into a much bigger privacy problem.
4. Don’t share client email addresses with other businesses without a good reason
Your client’s email address isn’t yours to pass around.
That means you shouldn’t casually hand over a list of client or customer email addresses to another business, contractor, supplier or marketing company simply because they have asked for it.
There may be legitimate situations where another service provider needs access to certain information in order to provide a service, but that doesn’t mean you should automatically send them a spreadsheet containing every email address you’ve ever collected.
Before sharing personal information with another business, you need to consider why the information is being shared, whether it is actually necessary and whether the person whose information you’re sharing would reasonably expect this to happen.
It’s also worth knowing exactly which third-party services you’re using and what happens to the information you put into them. Your CRM, email marketing platform, booking system, form plugin and other tools may all be processing personal information on your behalf.
“It’s just an email address” isn’t quite the defence people sometimes think it is.
5. Don’t leave email addresses sitting somewhere they shouldn’t be
This is the one that is often overlooked because there’s no dramatic “data breach” moment.
Maybe you’ve downloaded your client list onto your computer. Perhaps there’s an old spreadsheet sitting in your Downloads folder. Maybe a form plugin is storing submissions indefinitely, or an old employee still has access to a shared account.
Or perhaps you’re using an email account with a weak password and no two-factor authentication.
The more places personal information exists, the more opportunities there are for something to go wrong.
This is why it’s worth regularly looking at where your client information is stored and asking yourself whether you still need it there.
Do you really need five-year-old contact form submissions? Does everyone who has access to your CRM still need that access? Are old spreadsheets sitting in Google Drive that nobody uses anymore? Is your business email properly secured?
You don’t need to become a cybersecurity expert to start asking these questions. You just need to stop assuming that because information is sitting quietly in a folder, it’s automatically safe.
Your client’s email address is their information, not your marketing asset
When someone gives you their email address, they’re trusting you to use it for a reason.
That might be to respond to an enquiry, manage their account, send an invoice, deliver something they’ve purchased or communicate with them about a project. Whatever the reason, it’s worth keeping that original purpose in mind.
Good privacy practices aren’t just about having a privacy policy tucked away in the footer of your website. They’re also about what you actually do with people’s information once it lands in your hands.
And if you’re a small business owner managing your own website, forms, email and marketing, it’s worth taking a little time to look at the whole journey.
Where is the information collected? Where is it stored? Who can access it? Which third-party services receive it? How long do you keep it? And, perhaps most importantly, are you using it in a way that your customer would reasonably expect?
Your clients don’t need you to be perfect. They do need you to take their information seriously.
And that starts with treating their email address like it’s something you’ve been trusted with, rather than something you’ve been given to do whatever you fancy with.