About mail recipients (To:)

This page explains "To" in bulk email delivery.



Contacts, shown by tags or in lists, with the following attributes can be set as recipients.

  1. Email address in "Email1"
  2. Details (name, importance, company information, Email1) are not set as private


The following should be excluded from recipients.

  • Email addresses containing "" or "" when domain authentication is not set.


Exceptions to those above

  1. Contacts with multiple email addresses
    ・Only the most recently registered email will be included."
  2. Recipients included are in the undeliverable list
    ・If the delivery status is "Unknown user", "Unknown host", "Rejected", or "Unidentified error", the contact will be automatically added to the undeliverable list and excluded from future emails.
  3. When doing one-to-one mails, the sender email address (contact owner) isn't the registered address.
  4. There are recipients on the unsubscribed or blocked lists.


Related pages

  • More information here about domain authentication settings


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