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Incoming authenticated mail rejected by spamhaus PBL

mconstable

New Pleskian
I have an email client connecting via 3G with various dynamic IPs during the day but whenever she gets one from this particular range...

http://www.spamhaus.org/pbl/query/PBL1426427

then she gets rejected with a 554 5.7.1 Service unavailable; Client host [101.169.xx.xx] blocked using zen.spamhaus.org; error. She is authenticating on SSL port 465 so I'm not sure why the spamhaus PBL is rejecting her incoming messages. The only thing I can think of is the mailserver is on a virtual IP (eth0:12) and the SSL cert is the default system wide original self signed one (atm).

Is postfix thinking her incoming mail is being relayed because of the virtual IP of her outgoing mailserver?

Would any Plesk system mail specialists have any idea how I could work around this?
 
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