I suspect that this is being blocked because these are new IPs that AT&T has never received mail from, so they block them by default. Is there an official way to inform AT&T before trying to send mail from new IPs that new IPs will be sending mail?  As far as I know AT&T is the only service that outright blocks messages from new and unseen IP addresses by default.

No. TNL(t-online) is even worse.
BTW, you may contact Lili directly who is on this list.


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Jeff Pang
jeffp...@aol.com
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