Cisco Cisco Email Security Appliance C170 Guía Del Usuario

The 

tophosts

 command returns a list of the top 20 recipient hosts in queue. This command can help 

you determine if network connectivity problems are isolated to a single host or group of hosts to 
which you are attempting to send email. (For more information, see “Determining the Make-up of 
the Mail Queue” on page 49.)

“Drill-down” to use the 

hoststatus

 command on the top domains listed from the 

tophosts

 

command results. 

The 

hoststatus

 command returns monitoring information about email operations relating to a 

specific recipient host. DNS information stored in the AsyncOS cache and the last error returned 
from the recipient host are also given. Data returned is cumulative since the last 

resetcounters

 

command. (For more information, see 

.) 

Using the 

hoststatus

 command on the top domains can isolate the performance issues with DNS 

resolution to the either the appliance or the internet. For example, if the 

hoststatus

 command for 

the top active recipient host shows many pending outbound connections, then try to determine if that 
particular host is down or unreachable, or if the appliance cannot connect to all or the majority of 
hosts. 

mail3.example.com> tophosts

Sort results by:

1. Active Recipients

2. Connections Out

3. Delivered Recipients

4. Soft Bounced Events

5. Hard Bounced Recipients

[1]> 1

Status as of:         Mon Nov 18 22:22:23 2003

ActiveConn.Deliv.SoftHard

# Recipient HostRecipOutRecip.BouncedBounced

1  aol.com36510255218

2  hotmail.com29071982813

3  yahoo.com13461231119

4  excite.com9838494

5  msn.com8427633

29