mnewsome 0 Junior Poster

Have been using Outlook 2003/2007 for years with no major issues. Last week I found that the outbox on both of my machines were not clearing. My Outlook works with a third party internet email service. The incoming/outgoing servers and other settings were appropriate. I next opened a case with Verizon, my DSL service. They are suggesting that the outgoing port has been changed to 587 not 25. The tech went on to say that this change was initiated by Microsoft... Sounded like nonsense to me. Pinging smtp.onebox.com has repeatedly timed out. My suspicion is that Verizon blocked access to this server and doesn't care who is affected. The tech did start the process for a 'whitelisting' that should take one week. What else can I be doing to troubleshoot this issue?