Hi,

Recently, we cant send email to yahoo, email bounce back and the error from the log says:

Accepted POP3 connection with: 172.16.132.239
11:30:34 2F1 Successful login with client/server access: 66.198.139.69:1677
11:30:34 2F1 POP3 session ended: 172.16.132.239
11:30:34 2F1 Accepted POP3 connection with: 172.16.174.23
11:30:34 32C Accepted POP3 connection with: 172.20.3.72
11:30:34 2F1 Successful login with client/server access: 66.198.139.69:1677
11:30:34 2F1 Successful login with client/server access: 66.198.139.69:1677
11:30:34 2F1 POP3 session ended: 172.20.3.72
11:30:34 2CE DMN: MSG 463927 SMTP session ended: 66.198.139.71
11:30:34 24E DMN: MSG 463918 Send Failure: 421 4.7.0 [TS01] Messages from 66.198.139.69 temporarily deferred due to user complaints - 4.16.55.1; see http
11:30:34 5C4 DMN: MSG 463915 Send Failure: 421 4.7.0 [TS01] Messages from 66.198.139.69 temporarily deferred due to user complaints - 4.16.55.1; see http
11:30:34 2F1 POP3 session ended: 172.16.174.23
11:30:35 3AA DMN: MSG 463919 Send Failure: 421 4.7.0 [TS01] Messages from 66.198.139.69 temporarily deferred due to user complaints - 4.16.55.1; see http
11:30:35 59C DMN: MSG 463920 Send Failure: 421 4.7.0 [TS01] Messages from 66.198.139.69 temporarily deferred due to user complaints - 4.16.55.1; see http
11:30:35 2F1 Accepted POP3 connection with: 172.20.12.130
11:30:36 2F1 Accepted POP3 connection with: 172.30.2.80
11:30:36 2F1 Successful login with client/server access: 66.198.139.69:1677
11:30:36 32C Successful login with client/server access: 66.198.139.69:1677
11:30:36 32C POP3 session ended: 172.20.12.130
11:30:36 32C POP3 session ended: 172.30.2.80
11:30:36 2CE DMN: MSG 463928 SMTP session ended: 66.198.139.71
11:30:37 217 Queuing deferred message: CBCOES02/SYS:\DOMAIN\WPGATE\GWIA\send\sbed28a2.022
11:30:37 217 MSG 463929 Analyzing result file: CBCOES02/SYS:\DOMAIN\WPGATE\GWIA\result\rbed2848.009
11:30:37 217 MSG 463929 Detected error on SMTP command
11:30:37 217 MSG 463929 Command: yahoo.com
11:30:37 217 MSG 463929 Response: 421 4.7.0 [TS01] Messages from 66.198.139.69 temporarily deferred due to user complaints - 4.16.55.1; see http://postm
11:30:37 536 MSG 463930 Processing inbound message: CBCOES02/SYS:\DOMAIN\WPGATE\GWIA\receive\2543DEB4.917
11:30:37 536 MSG 463930 Sender: online@chinabank.ph
11:30:37 536 MSG 463930 Recipient: longp_320@yahoo.com
11:30:37 536 MSG 463930 Building message: sbed345d.033
11:30:37 536 Recipient: longp_320@yahoo.com
11:30:37 217 Queuing deferred message: CBCOES02/SYS:\DOMAIN\WPGATE\GWIA\send\sbed28a2.023
11:30:37 536 MSG 463932 Processing inbound message: CBCOES02/SYS:\DOMAIN\WPGATE\GWIA\receive\9543DEB4.920
11:30:37 536 MSG 463932 Recipient: otoka28@yahoo.com
11:30:37 536 MSG 463932 Building message: sbed345d.034
11:30:37 536 Recipient: otoka28@yahoo.com
11:30:37 217 Queuing deferred message: CBCOES02/SYS:\DOMAIN\WPGATE\GWIA\send\sbed2f09.048
11:30:37 536 MSG 463933 Processing inbound message: CBCOES02/SYS:\DOMAIN\WPGATE\GWIA\receive\A543DEB4.921

What should I do? Is this error critical?

Please help.

Thanks!
Ken