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I send emails to a large group in BCC addresses every month. This month returned as blocked. 0 Recommended Answers 1 Reply 0 Upvotes
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I have send it this way for years.  Has something changed?  I organize large groups.  What can I do?
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Outgoing e-mail is very sensitive to the appearance of being bulk or spam.  Mass (or bulk) e-mail is also very sensitive to the receivers using the “report spam” button (people tend to be lazy and just “report spam” instead of trying to unsubscribe or request removal from the list).  Gmail is NOT a bulk e-mail provider so repeatedly sending bulk messages can cause problems.  This can be seen both as a reference to an error “69585” or as having “reached a limit for sending mail”.

The following provides a lot more detail on the issue as well as a number of alternate solutions:  https://support.google.com/mail/thread/2372914 
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