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Barry,

If I send to all groups, I should get 8 emails back. Lately, I have
been getting anything between 0- 8 back,

The spam filter is the usual #1 suspect in such cases, but since you've checked that...

Have a look on your Subscription page for one of the groups where you did /not/ receive a message back. On the Email Delivery History tab there may be some information about the missing message, if it was in fact rejected by your email service. Or, if the missing message was the most recent message sent to you by the group it may confirm that your email service accepted the message - in which case ...

If your email service is "powered by Gmail" it is possible that Gmail's algorithms are hiding the extra messages from you. Gmail notices when you have more than one copy of a message and tends to show you only one of them. They judge copies to be "the same" message not by content, but by the Message-ID field in the header. In the case of a single post to multiple groups, all the outbound messages would contain the Message-ID of the message you sent*. But this behavior should be consistent, not hit-or-miss, so I'd have to judge this as an unlikely answer.

Shal
* Your account's Preferences page includes the "I always want copies of my own emails" checkbox. If checked then Groups.io replaces the Message-ID on messages sent back to you, from you (your account address), to avoid this hiding issue.


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