I'm posting on behalf of someone :-
They have an HTC Desire, and they periodically get the following message when attempting to send out emails:
Warning - Your outgoing server response: 550-Your IP address is on the XBL blacklist! Sending denied.
The phone provides an IP address, which indeed is blacklisted.
http://cbl.abuseat.org/lookup.cgi?ip=82.132.243.28
This IP resolves to "unknown" somewhere in Germany. We are situated in the UK, as is our email provider.
I have checked with our provider, and the IP of our mail server is not blacklisted (and does not match the one the phone says).
I should add, I am able to send email perfectly well on my iPhone, using (presumably) the same settings. Our computers are unaffected - it is just the HTC.
Does anyone have any advice, or experienced something similar?
I'm reluctant to de-list the IP as I imagine the problem will keep occurring.
Thanks for any insight.