NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable

[Pete]

Hello,

I am new to plesk and having this issue. I have searched and havent really found a solution for it.

This is the code blocks in question

Dec  5 22:30:11 vps postfix/smtpd[16128]: connect from unknown[unknown]
Dec  5 22:30:11 vps postfix/smtpd[16128]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
Dec  5 22:30:11 vps postfix/smtpd[16128]: lost connection after CONNECT from unknown[unknown]
Dec  5 22:30:11 vps postfix/smtpd[16128]: disconnect from unknown[unknown]

Now this is the odd thing... and maybe could shed some light as to what is causing it... when i grep the log file for milter i get this:

    Line 3: Dec  5 00:00:13 vps postfix/smtpd[1223]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 196: Dec  5 00:30:13 vps postfix/smtpd[6632]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 554: Dec  5 01:00:15 vps postfix/smtpd[9385]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 962: Dec  5 02:30:13 vps postfix/smtpd[12101]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 1008: Dec  5 03:00:28 vps postfix/smtpd[12590]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 1883: Dec  5 03:30:14 vps postfix/smtpd[14083]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 1998: Dec  5 04:30:11 vps postfix/smtpd[18984]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 2005: Dec  5 05:00:13 vps postfix/smtpd[19463]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 2012: Dec  5 05:30:15 vps postfix/smtpd[20417]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 2040: Dec  5 06:00:11 vps postfix/smtpd[20736]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 2211: Dec  5 06:30:11 vps postfix/smtpd[14963]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 2243: Dec  5 07:00:25 vps postfix/smtpd[23747]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 3844: Dec  5 08:00:13 vps postfix/smtpd[3017]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 4683: Dec  5 08:30:12 vps postfix/smtpd[4495]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 4830: Dec  5 09:00:38 vps postfix/smtpd[5808]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 5145: Dec  5 09:30:15 vps postfix/smtpd[6852]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 5548: Dec  5 10:00:11 vps postfix/smtpd[7931]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 5810: Dec  5 10:30:11 vps postfix/smtpd[8653]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 6026: Dec  5 11:00:28 vps postfix/smtpd[10428]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 7275: Dec  5 11:30:16 vps postfix/smtpd[14050]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 7374: Dec  5 12:00:11 vps postfix/smtpd[15423]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 7672: Dec  5 12:30:14 vps postfix/smtpd[16428]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 8209: Dec  5 13:30:12 vps postfix/smtpd[24653]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 8763: Dec  5 14:00:13 vps postfix/smtpd[26136]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 9182: Dec  5 14:30:20 vps postfix/smtpd[27293]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 9991: Dec  5 15:00:13 vps postfix/smtpd[28649]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 10230: Dec  5 15:30:12 vps postfix/smtpd[29787]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 10256: Dec  5 16:00:11 vps postfix/smtpd[30313]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 10522: Dec  5 16:30:13 vps postfix/smtpd[31232]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 10804: Dec  5 17:00:14 vps postfix/smtpd[896]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 11257: Dec  5 17:30:11 vps postfix/smtpd[3302]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 12972: Dec  5 18:30:22 vps postfix/smtpd[5974]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 13998: Dec  5 19:00:14 vps postfix/smtpd[7397]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 15959: Dec  5 19:30:14 vps postfix/smtpd[9953]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 16024: Dec  5 20:00:14 vps postfix/smtpd[11077]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 16801: Dec  5 21:00:11 vps postfix/smtpd[13828]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP
    Line 16837: Dec  5 21:30:10 vps postfix/smtpd[14703]: NOQUEUE: milter-reject: CONNECT from unknown[unknown]: 451 4.7.1 Service unavailable - try again later; proto=SMTP

Now you can see from the time stamps they are almost exactly 30 minute intervals... What could be causing this?

 

[abdi]

https://kb.odin.com/en/120384

 

[Pete]

https://kb.odin.com/en/120384

Thank you for oyur reply Abdi. Psa-remote is started and i dont have premium antispam nor have i installed it.
How can i test if the milter is listening at all?