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Keep every email list healthy

Mirin checks each email address before it saves a lead, a customer, a signup or a subscriber. Addresses that cannot receive mail are caught before they cost you deliveries.

On this page

What Mirin checks

Email audience

10 people · 6 subscribed
People
10
Subscribed
6
Unsubscribed
1
Suppressed
2
PersonStatusListsSourceLast engagementAdded
Maya Chen[email protected]SubscribedMonthly newsletterIntro week waitlistNewsletter signupClicked email2 hours agoSep 14yesterday
Daniel Ortiz[email protected]SubscribedMonthly newsletterContact formOpened email5 hours agoSep 105 days ago
Sam Okafor[email protected]SubscribedPast membersManualReplied to emailyesterdayAug 302 weeks ago
Jordan Ellis[email protected]SubscribedIntro week waitlistChatSent a message3 days agoSep 114 days ago
Noah Reyes[email protected]SubscribedMonthly newsletterPast membersManualClicked email4 days agoMay 214 months ago
Grace Kim[email protected]SubscribedMonthly newsletterNewsletter signupOpened email6 days agoAug 9a month ago
Email, then Audience, for a sample studio. Pick a sample address, choose Add person in the dialog, and read the answer Mirin gives. The sample addresses stand in for the real check.

Every address gets the same checks, run on Amazon SES. A result is remembered for a while, so the same address is not checked again each time it appears.

Format
The address has to be a real email format, so a typo such as a missing .com is caught first.
Domain
The part after the @ has to be a domain that can receive mail.
Mailbox
The mailbox itself has to be likely to exist.
Quality
Disposable addresses and randomly generated ones are turned away.

What you are told

When you add a person in Email with an address that fails, the dialog keeps what you typed and shows one of these answers. Nothing is saved until the address passes.

What happenedWhat the dialog says
A disposable addressPlease use a permanent email address so we can reach you.
A domain that cannot receive mailThat email domain cannot receive mail. Please check the spelling.
A mailbox that does not existWe could not verify that mailbox. Please check the email address.
Anything else, such as a typoPlease check the email address and try again.

Where addresses are checked

The same checks run wherever someone gives you an email address.

  • Forms. On your published pages, before a submission is saved.
  • Website chat. When a visitor shares their email.
  • Your store. Checkout, customer sign in and subscriptions.
  • People you add. Add person in Email, adding people to a list, and store customers you create.
  • Accounts. Team invites, and signing up for Mirin itself.

Checked again before marketing email

Email audience

10 people · 6 subscribed
People
10
Subscribed
6
Unsubscribed
1
Suppressed
2
PersonStatusListsSourceLast engagementAdded
Ava Brooks[email protected]SuppressedNo listsContact formNo engagement yetJun 23 months ago
Tom Walsh[email protected]SuppressedNo listsNewsletter signupNo engagement yetApr 285 months ago
Email, then Audience, showing Suppressed people. Open the Suppressed definition, or open Filter and sort to show everyone.

Before a sequence email or a newsletter goes out, Mirin checks the address again. An address that bounced hard or drew a spam complaint is suppressed, and nothing more is sent to it. That protects the reputation of your sending domain.

Suppressed
The address bounced hard, complained, or was blocked by you. Nothing is sent to it, not even system emails.
Suppressed addresses
Insights, then Email counts the addresses on your website that no longer receive email, beside bounces and complaints.
Unsubscribed
A person who opted out still receives system emails such as confirmations and receipts. Only marketing email stops.

When the check cannot run

Checks run against a live service, and some addresses stop receiving email later on. Here is what happens in each case.

A real lead is never lost to a busy checker

If the checking service is briefly unavailable, Mirin keeps the lead or customer instead of turning them away. The address is checked again before any sequence email or newsletter is sent to it.

Does an unsubscribe stop receipts and confirmations too?
No. A person who opted out still receives system emails such as confirmations and receipts. Only marketing email stops.
Is a suppressed address ever emailed again?
No. Nothing is sent to a suppressed address, not even system emails.
Is the same address checked every time it appears?
No. A result is remembered for a while, so the same address is not checked again each time it appears.

To see how your email is landing overall, read Read performance honestly in the Email marketing guide.