My Exact Message - Update i have even gone to Google and extended my Push API, still did not work, 2nd time this has happened, password/no ssl checked, tried port :587, using V12 on Win2008R2 on AWS, Restarted SMTP Service/3CX & Server, Ports checked, nothing and i needed this today :-((
Is there a MAPI Application that can be recommended as this is so unreliable
FIXED or SOLVED
Anti Virus Access Protection caused the blocking of emails - edit the rule, save and test, test, test until you get it right
Look in event log Application - Source McLogEvent Event ID:257 for msg "blocked by port blocking rule"
PDF: Using McAfee VirusScan Enterprise - PAGE 21
http://www.hawaii.edu/itsdocs/win/vse87i.pdf
Give me *****