Hi, We have installed Rollup 4 for exchange 2007 SP2 last week and we are facing lots of issue after installing the same like our Blackberry BIS users is not able to send and receive their email, our mail server being included on a spam house antispam list, this update resetted the SMTP setting and I got the below error also when our pop3 users trying to send any mail to external domain from outside our network. “Sending' reported error (0x800CCC62): 'Your outgoing (SMTP) e-mail server has reported an internal error. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).” Regards, Hakim.B Sr.Windows System Administrtor (ITS) Hakim