Server does not recognize my recipients when sent as group email
Now, when I try to send the email to those groups, I get the following error:
The server "smtp.talktalk.net" did not recognize the following recipients:
And then it lists some of the addresses, about 25 for the first group and well over 100 for the second.
When I send to the 'unrecognized' address individually, it is sent through without a problem, but as part of a bulk email to a big group it doesn't work. I phoned my ISP, TalkTalk, and they assured me there was no limit imposed by them on the number of recipients, that they hadn't blocked any ports or set any spam / junk filters.
So I broke the lists down to fewer than 50 people each in multiple lists. This now works and the email is sent.
If the ISP isn't creating a problem, then why can I not send to large mailing lists? This is going to be such a waste of time if it can't be sorted out...
I saw a similar thread on the Tiger forum that didn't seem resolved. I never had this problem in Panther, even with bigger lists.
Any ideas?
Cheers.
MacBook Pro 2.4GHz, Mac OS X (10.5.5)