We have a file extension .log which were being used to send/receive in our environment.e.g. Yahoo domain to our Internal domain (e.g abc.com).
2 weeks ago we noticed that when we attach .log file in order to send from abc.com to Yahoo domain then the file is not being downloaded from Yahoo domain since Yahoo can easily send .log file to abc.com.
However if we attach .log file from our abc.com and send to Hotmail, Gmail, etc then it is working fine as well as if .log file is attached in reply then it is also working fine.
Why .log file is not being downloaded from Yahoo domain?
Is this issue related with McAfee Antispam, ePO or with Yahoo it self?