I have a group of about 250 people that I regularly email for an amateur society. I have had to split these into small groups of 30 otherwise my account tells me I've exceeded my authorisation and I have to reset everything. Now I have just sent them in those smaller groups and got the message "Message rejected as it apepars to be spam. Use STMP AUTH, post office or contact the postmaster". This has come for 3 of the 7 groups but not all of them. Why has this suddenly started happening, it is very tedious.
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