failed login pop3 and smtp authentication

[wp11b]

hi all,

i have a problem with a cpanel pop3 service
the problem is a login in pop3 .. all the mail clients on port 110 respond with a login failed. also with smtp authentication login failed. it was happened twice and the temporary solution only restart the server. i have cross check the log and nothing strange. anybody could share ?

 

[cPanelMichael]

Hello

You can try browsing the following log file for a specific error message:

/var/log/maillog

Try searching the log for the specific date/time you experienced this issue to see what the output was.

Thank you.

 

[wp11b]

okay,
maillog got error :

Apr 4 11:51:20 massvr2 pop3d: LOGIN FAILED, [email protected], ip=[::ffff:10.63.10.184]
Apr 4 11:51:20 massvr2 pop3d: authentication error: Input/output error
Apr 4 11:51:20 massvr2 pop3d: LOGIN FAILED, [email protected], ip=[::ffff:10.82.12.23]
Apr 4 11:51:20 massvr2 pop3d: authentication error: Input/output error
Apr 4 11:51:20 massvr2 pop3d: LOGIN FAILED, [email protected], ip=[::ffff:10.63.10.68]
Apr 4 11:51:20 massvr2 pop3d: authentication error: Input/output error
Apr 4 11:51:21 massvr2 pop3d: Connection, ip=[::ffff:110.136.198.52]

any assist ?

 

[hbouma]

I just had this happen on four different cpanel servers at the same time today so something seems to be up.

 

[wp11b]

today this problem happned again, any body would share about this problem. today we tried to force update. increased Authentication Daemons. still not solve

 

[wp11b]

i think it's because high load cpu process, i did top command but didn't found what make cpu high, any body can share with me. because when did top show very fast

 

[wp11b]

i think it's because high load cpu process, i did top command but didn't found what make cpu high, any body can share with me. because when did top show very fast

 

[jhio]

I have the same problem.. same line on log and I've not been able to find the cause, I'm not an expert.. any help please??
thanks a lot for your time