* Anne P. Mitchell:

> Receivers don't block email from new IPs by default; they block them
> when they notice something amiss with the email (be it improper
> authentication, spam complaints, or something else).

That looks like a too generalised assessment to me. As I mentioned in a
different thread on this mailing list, my experience with Telekom /
T-Online has been that their MXs soft-block servers with unfamiliar IPs
from handing over email by default.

One needs to contact them via a specific service address contained in
the rejection message, and have the new IP address cleared for mail
delivery to T-Online operated domains. That's not exactly in the spirit
of a free Internet, but obtaining server clearance is a matter of a few
hours only, based on my own experience with this process over the years.
It is also a once-per-IP-address thing.

-Ralph
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