My company IronPort has limited outgoing mail attachment size to 13MB. Recently, I found that when I send a mail attached with a rar file (10MB), the IronPort has detected the message size is over 13MB. Actually, the message body contains few words a...

I've created anti-virus and anti-spam syslog pushed to a log analyzer. I've checked the log analyzer and found IronPort can successfully collect syslog from IronPort. But sometimes I receive an alert from IronPort below. What's the problem? It seems ...

Recently, I've installed a C100 in my company. The email server is SendMail, After I configured SendMail to send email through C100. Some users reported that they got the bounce mail The original message was received at Wed, 28 Nov 2007 11:14:03 +080...

I've implemented a new mail system for a new company recently. But some staffs in this company reported that they could not send email to some domains like hotmail.com, msn.com,etc. So I go to senderbase.org to check my company IP address and "Email ...

Can anyone explain the procedure of creating common external quarantine in KB Answer ID:897??