[nznog] Xtra and port 110

We just had a customer on the phone unable to connect to our POP3 server from an Xtra DSL address; pop3s (995) and SMTP submission (587) worked fine, but no port 110 packets arrived at all. A quick squiz at the logs suggest that there has been rather less port 110 activity from Telecom DSL addresses than I would expect, but I don't have a lot of data. Is something going on? -- don