I guess it is not a interspire problem, just a smtp limitation because I did a campaign based on PHPMailer with same smtp server and the same problem occur after arround 500 emails, undeliverable bla bla ...
same problem here, stops after 500-900 emails, I copied campaign, I deleted sent mails from list, and works again for another 500-900
It's a little rude to be on this forum, ask something and then go away with solution without sharing...
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