dovecot_plain authenticator failed

attroll

• January 28, 2019 10:30

I am getting a lot of these errors in my exim_rejectlog. I don't know anything about this. Can someone explain this and how I could fix this or at least send me in the right direction. 2019-01-28 05:30:01 dovecot_plain authenticator failed for (127.0.0.1) [37.237.180.205]:44986: 535 Incorrect authentication data (set_id=attroll@****.com) 2019-01-28 05:30:07 dovecot_login authenticator failed for (127.0.0.1) [37.237.180.205]:44986: 535 Incorrect authentication data (set_id=AB\023)

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  keat63

  • January 29, 2019 07:46

  Looks to me like somebody or something is trying to log in to the email account attroll@xxx.com and AB\023 (which probably doesn't exist) Maybe a smtp connection trying to send emails. The I.P 37.xxx.xxx.xxx appears to be Iraq. Do you have CSF firewall installed ?

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  cPanelLauren

  • January 30, 2019 16:47

  If that originating IP address isn't your local IP address (or your client's) it does indeed look like a brute force attempt. Along with @keat63 suggestion cPhulk would also be helpful in this instance. cPHulk Brute Force Protection - Version 76 Documentation - cPanel Documentation

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  mamati.yazdanbakhsh

  • May 31, 2020 05:56

  hello i have receved this log in whm for a acount host 2020-05-31 10:17:40 dovecot_login authenticator failed for ([127.0.0.1]) [37.152.162.4]:44764: 535 Incorrect authentication data (set_id=av@roozbeh. ac .ir) 2020-05-31 10:17:42 dovecot_plain authenticator failed for ([127.0.0.1]) [37.152.162.4]:44764: 535 Incorrect authentication data (set_id=av@roozbeh .ac .ir) 2020-05-31 10:17:42 dovecot_login authenticator failed for ([127.0.0.1]) [37.152.162.4]:44776: 535 Incorrect authentication data (set_id=av@roozbeh .ac .ir) 2020-05-31 10:17:44 dovecot_plain authenticator failed for ([127.0.0.1]) [37.152.162.4]:44776: 535 Incorrect authentication data (set_id=av@roozbeh .ac .ir) 2020-05-31 10:17:46 dovecot_login authenticator failed for ([127.0.0.1]) [37.152.162.4]:44782: 535 Incorrect authentication data (set_id=av@roozbeh. ac. ir) i susbended this acount but again receved this log. pleace help me. and sorry for bad english :)

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  mamati.yazdanbakhsh

  • June 02, 2020 05:05

  hello i removed my problem IPREMOVED this ip in the white list and we remove this ip addres thanks cpanel.net

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  keat63

  • June 02, 2020 10:21

  I would guess that even if the account is suspended you could still get these errors. I quite often see these for accounts that don't even exist. If someone is trying to gain access to av@roo****.ac.ir, then it would be best to determine if this is the actual user who has maybe forgotten his/her password. If you believe this to be a hacker trying to gain access, then ensure that the password would be impossible to guess. Consider blocking the IP address in CSF.

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  mamati.yazdanbakhsh

  • June 02, 2020 10:43

  I would guess that even if the account is suspended you could still get these errors. I quite often see these for accounts that don't even exist. If someone is trying to gain access to av@roo****.ac.ir, then it would be best to determine if this is the actual user who has maybe forgotten his/her password. If you believe this to be a hacker trying to gain access, then ensure that the password would be impossible to guess. Consider blocking the IP address in CSF.

  
  thanks for answer

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