7 types of email that build lasting customer relationships

Seven types of email do most of the work of building a customer relationship: a welcome, a thank-you, a customer story, a gentle reminder, an early access offer, a note on a date that matters to the customer, and an update on your own milestones. They work because each one gives the customer something, such as help, recognition or first access, before it asks for anything.

A relationship also protects your email. Recipients who value your messages are less likely to mark them as spam, and Gmail asks senders to keep their reported spam rate below 0.3%. The ideas below apply to online shops and to B2B and SaaS companies alike.

1. An honest welcome

A welcome email goes out the moment someone subscribes, signs up or becomes a customer. It is your first chance to show what the relationship will be like.

Keep it short and helpful:

• Say thank you and confirm what they signed up for.
• Tell them what to expect from you and how often.
• Show them where to get help, with a real reply address or support link.
• Give one clear first step. For a shop that might be a discount on the next order. For a SaaS product it is the first action that shows value, such as connecting an integration or inviting a teammate.

For longer onboarding, turn the welcome into a short sequence. See our guide to drip marketing.

2. A helpful thank-you

Say thanks when a customer does something that helps you: buys, renews, refers someone, leaves a review or answers a survey.

For online shops, the most important thank-you is the order confirmation. Thank the customer, confirm what they bought, share delivery and tracking details and link to support. These emails are transactional. Under the US CAN-SPAM Act, messages whose main purpose is to complete a transaction are exempt from most of the law's rules. If you add a promotion, keep the order details first. The FTC treats a message as commercial when its subject line suggests an ad or the transactional content is not mainly at the beginning. Read how to create a transactional email.

In B2B, a thank-you after a renewal, a referral or a case study interview, signed by a real person, means more than a template.

3. The customer story

Trust grows when people see others like them succeed with you. Build an email around one customer: a short introduction, the problem they had, what changed, and a quote, photo or short video in their own words.

• E-commerce brands can feature a customer review or a photo a customer shared, with permission.
• B2B companies can share a short case study or a tip from a power user.

Treat it like a mini newsletter on one topic, not an advert. It also gives your user-generated content a second life.

4. A gentle reminder

Reminders are the most sales-driven email on this list, and they work best with a light touch. Baymard Institute puts the average online cart abandonment rate at 70.22%, based on 50 studies, so there is plenty to win back.

Make the reminder useful:

• Use a clear subject line and show exactly what they left behind.
• Offer one button back to the cart, form or account.
• Answer the likely objection, such as shipping cost, returns or security.
• Send one or two reminders, then stop.

B2B versions include a trial that went quiet, a demo form left half-filled or a proposal that was opened but not signed. More in how to design a shopping cart recovery campaign.

5. The early access exclusive

Loyal customers like to feel like insiders. Give them first access to a new product, feature, event or sale before you announce it publicly.

Personalise the subject line or opening, explain why they are getting it first, and give a clear window, for example "available to you from Monday, to everyone from Thursday". In B2B, early access to a beta feature or a customer advisory session works the same way and gives you feedback before launch.

6. Their special days

Dates that matter to the customer give you a natural reason to get in touch:

• Birthdays, if the customer chose to share theirs, for a small treat or offer.
• Customer anniversaries, such as one year since their first order or since they signed the contract, with a thank-you and perhaps a summary of what they achieved with you.
• Seasonal buying moments, such as a reminder before the holiday when they bought a gift last year.

Keep these emails light and do not reveal more than the customer expects you to know, or they will feel intrusive. Store the dates in your CRM or email tool and let automation send them.

Anniversary and seasonal emails also work as win-back messages for customers who have gone quiet.

7. Your company's milestones

When your company reaches a milestone, such as an anniversary, a funding round, a new office or a major product release, invite customers to celebrate. Share a short update, a photo of the team and a thank-you, and say why you are writing to them specifically. A small offer helps but is optional.

These emails humanise your brand. They also give inactive customers a low-pressure reason to look at you again.

Rules every relationship email must follow

• Make opting out easy. CAN-SPAM requires commercial emails to include a clear way to opt out, honoured within 10 business days, and a valid postal address. Gmail requires bulk senders to support one-click unsubscribe in marketing messages.
• Authenticate your mail. Gmail requires bulk senders to set up SPF, DKIM and DMARC for their sending domain.
• Check local consent rules. Requirements differ by country, so check the rules that apply where your recipients live before you email them.
• Measure what matters. Apple's Mail Privacy Protection stops senders from seeing whether a message was opened, so judge these emails on clicks, replies, repeat purchases, renewals and unsubscribes.

The common thread

Lasting relationships rest on respect and give-and-take. Send the emails you would like to receive from a company you buy from, and the relationship will show up in your numbers. For more ideas, read our email marketing strategies and email marketing for B2B businesses.