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Updated 9 Oct 2026

E-mail: self-registration

CTS
eCTS

E-mail Registration Settings

Parameter Description
Email Mask Email address filter for user self-registration. The mask is specified as a regular expression.
Maximum Number of Login Attempts Number of attempts to enter the one-time code. When the failed attempts run out, you will need to request a new code.
The Maximum Number of Attempts to Send Code Before Blocking Number of one-time code requests from an IP address. When the limit is exhausted, new requests will become available after the time specified in the Time before unlocking, in seconds parameter.
Time before unlocking, in seconds After how many seconds the block is removed automatically.
Unblock IP address Removes the block on sending mail codes from an IP address.
White list of IP masks IP addresses to which the block does not apply.
⚠️ If many users connect through a single external IP address, add it to the whitelist.

How to Enable User Self-Registration?

  1. For self-registration to work, you must add an email-to-server match record (suggest):

    • Via eXpress support (for eXpress app users)
    • Manually by the administrator on
      ETS
      (when using a branded
      ETS
      app)
  2. Specify a mask. Users whose email matches the mask will be able to register automatically, even if an account on the server has not been created for them in advance.
  3. Select E-mail as a registration method.

How to Specify Multiple Email Domains?

Use a mask such as ^[\w-\.]+@(domain1.ru|domain2.ru)$.

How to Disable User Self-Registration?

Delete the mask.

What Happens If a User Enters an Email of an Already Existing Account?

⚠️ A duplicate account with the same email will be created in CTS. Such users are created with the email in their name. Edit the name manually in the “Users” section.