Maybe your IP block isn’t being accepted by Verizon? Can you traceroute it etc?
> On Jan 17, 2015, at 1:00 AM, Chris Adams <c...@cmadams.net> wrote: > > Anybody Verizon.net mail admins around? > > I have a downstream customer on a newly-deployed IP allocation that > can't get to pop.verizon.net (connections just time out). She can surf > elsewhere, she can take the same computer to another location (different > IP block) and it works, so it appears something on Verizon is filtering > out the IP space (from 107.190.192.0/20). > > Thanks. > -- > Chris Adams <c...@cmadams.net>