I have a Cisco2620 connected to the ISP with a 1M leased line. The router has been working fine for a year. Recently I can’t send mail to a particular domain, ihug.com.au whereas the rest of the mail domain is normal. I have tried some troubleshooting methods like telnet to the mail server of ihug.com.au 25 (at smtp port). When this command issued in the router console, it took 5 seconds to be responsed. However, it tooks 90 seconds or more from any servers behind the router. Tracae route is identical to the servers and router. What could be wrong ?
