If it makes a difference, I can ping only time.nist.gov. My email setting is set to "Use my email provider (SMTP) with requiring authentication and SSL boxes checked. Email test works. Is there something elsewhere I'm missing?
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Just out of curiosity, I disabled my firewall (Comodo) and anti-virus (Avast!) to see what would happen. As Emeril would say, "Bam!" Calendar updated successfully. Next I'll need to determine which program is blocking information either coming or going out (or both). If anyone has experienced the same and has a clue, chime in.
JJ