Firefox isn't a email program so what email program are you using?

gmail under Firefox

BLOCKED emails on Firefox, Group email list suggested. Only 10 addresses accepted per day. Can I do more?

That would be a gmail support issue not a firefox issue persay.

OK Thanks.

And could be Gmail limits how many sent out as it might classify that as Spam mailing.

Possibly, but the club's email functions normally after a period of a few weeks. Then, maybe a year later, the 100+ flyers are blocked again. I can send the email flyers from my personal email account while they're being blocked on the yacht club's site.

Then you need to check the destination email address and how big are the files your sending out. So whom is the email provide for the yacht club's site? Maybe ISP has some limitation on the email type or how big it is.

towindward said

BLOCKED emails on Firefox, Group email list suggested. Only 10 addresses accepted per day. Can I do more?

Hello towindward,

Could you provide a screenshot of the page where it says that Firefox blocked those emails and suggested Group email  ?

Would you please take a look at this article :

https://www.lifewire.com/send-a-message-to-a-group-fast-in-gmail-1172002

Also see :

https://support.google.com/contacts/answer/30970?hl=en