Support » Plugin: Email Users » BCC Limit setting

  • Resolved John

    (@dsl225)


    Hello,

    I don’t well understand the purpose of this new setting.
    When sending to several users or to groups, does the plugin send several individual messages or a single one with a BCC field containing all email addresses?

    If it sends individual messages to each user, what’s this setting for?

    https://wordpress.org/plugins/email-users/

Viewing 4 replies - 1 through 4 (of 4 total)
  • Plugin Author Mike Walsh

    (@mpwalsh8)

    The BCC Limit setting is not new, it has always been a component of Email Users. What is new in 4.8.0 is more options for the value of BCC Limit setting.

    When sending email to a group of users Email Users will try to send as few email messages as possible. In an ideal situation, all of the recipient addresses would appear in the BCC header of a single email. That is the default behavior of the plugin so if you never set BCC Limit, that is the behavior you’ll get.

    However, for spam prevention reasons, many hosting providers limit the number of addresses which can appear int he BCC header. This is where the BCC Limit kicks in.

    For example, suppose your hosting provider has a limit of 25 email addresses in the BCC header but your WordPress site has 192 users who will receive an email. With the BCC limit set to 25, Email Users will send 8 separate emails (Users 1-25, 26-50, 51-75, 76-100, 101-125, 126-150, 151-175, 176-192).

    Similarly, if the BCC limit was set to 10, Email Users would send 20 separate emails each with 10 addresses in the BCC header except for the last one which would only have two (191-192).

    It is due to each email being sent to multiple recipients that Email Users does not support user specific keyword replacement. It isn’t possible to have a unique email when the email is being sent to multiple recipients.

    Thread Starter John

    (@dsl225)

    Many thanks for your feedback.

    As far as I can understand, if sending to multiple users with BCC, recipients will be able to see other users email addresses when they get their message? That’s not really cool…

    But anyhow. What happens when using the first 2 settings?
    1 (use To: field)
    1 (use BCC: field)

    If I use the first one – 1 (use To: field) – when sending to, let’s say, 20 users, does that mean that all of them will get an individual email message with their own address in the To: field?

    Plugin Author Mike Walsh

    (@mpwalsh8)

    The whole point of using the BCC field is to hide the list of recipients from everyone who receives the message. That is defined by the MTA standard (RFC?). As long your server isn’t messing with the headers it should work as expected.

    When setting BCC limit to 1, every user gets a unique email and when using the TO field, the recipient appears in th TO header instead of the BCC header.

    There is a debug mode where you can see the mail headers which are constructed without actually sending email but make sure to turn it back off because it overloads wp_mail() when enabled.

    Thread Starter John

    (@dsl225)

    Great, you are right, my mistake – I read BCC but thought CC…
    That’s fine then, many thanks!

Viewing 4 replies - 1 through 4 (of 4 total)
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