After registered come active mail matter

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After registering for a service or account, it's common to receive an "active mail matter" or "activation email" from the service provider. This email is sent to confirm your registration and activate your account.

Here's what typically happens:

1. You register for a service or account on a website or platform.
2. The service provider sends you an email to the email address you provided during registration.
3. The email contains a link or a verification code that you need to click or enter to activate your account.
4. Once you click the link or enter the verification code, your account is activated, and you can start using the service.

The purpose of this email is to:

• Verify that you're the actual owner of the email address you provided during registration.
• Activate your account, allowing you to access the service or platform.
• Provide you with a way to reset your password if you forget it in the future.

So, to summarize, "active mail matter" is just a fancy way of saying "activation email" or "verification email" that's sent to confirm your registration and activate your account.