Blacklists or blacklists are Domain Name System based Blackhole List or real time Blackhole List is an attempt to stop email spamming . It is a "blacklist" of places on the Internet that are considered email spamming that consist of IP addresses that are most commonly used to publish computer or network addresses associated with spam.
To display information about your mail, consider a VPS with the ISPmanager5 panel, where Exim is installed as the mail server
Let's run the command in the console:
Debian/Ubuntu
tail -f /var/log/exim4/main.log
Centos
tail -f /var/log/exim/main.log
This command will print new entries in the mail service log in realtime. This is to see which entry relates to your mail. After running this command, open your mailbox in a new tab and send an email from it with the usual content to the mailbox, to which you do not get messages and they end up in the "spam" folder.
As soon as you have sent the mail, go back to the console window, where you should have already seen some log entries. Wait and then stop viewing the logs by pressing Ctrl + C.
Look through the log. You will be interested in errors where the word spam is involved, it usually looks like this:
SMTP error from remote mail server after end of data:
550 spam message rejected.
or
Message rejected as spam by Content Filtering Message rejected under suspicion of SPAM Message rejected.
These errors often include a solution, an error code and a link to go to in order to learn more about why the error occurred.
In the ISPmanager5 control panel these logs can be viewed through the file manager, which you will find in "System → File Manager ".
Examples from the mail log when an IP gets on the Spam Lists, the following errors will be displayed:
Gmail.com
Error:
R=dnslookup T=remote_smtp: SMTP error from remote mail server after end of data: host gmail-smtp-in.l.google.com [11.111.11.111]: 550-5.7
[LOCKED IP 11] Our system has detected that this message is\n550-5.7.1 not RFC 2822 compliant. To reduce the amount of spam sent to
Gmail,{n550-5.7.1 this message has been blocked. Please review\n550 5.7.1 RFC 2822 specifications for more information. fa7siwe59404lbc.40 - gsmtp
To unblock a mail IP address, write to this form:
- In the field "E-mail address to contact you " specify the address to which the answer from technical support google.
- In the "Domains affected by the problem " field specify the blocked IP address of the mail server.
- In the "Comments " field we indicate what measures were taken to remove spam from the server.
Mail.ru
Error:
SMTP error from remote mail server after RCPT TO:<*@mail.ru>:
host mxs.mail.ru [11.111.11.111]: 550 Sorry, we do not accept mail from hosts
with dynamic IP or generic DNS PTR-records. Please get a custom reverse DNS name from your ISP for your host LOCKED IP or contact abuse@corp.mail.ru in case of error
Send a request to abuse@corp.mail.ru. In the letter specify the IP of the server to be unblocked and state what measures were taken to remove spam from the server.
Hotmail.com
Error:
SMTP error from remote mail server after MAIL FROM:<********@mail.ru>SIZE=2757:
host mx2.hotmail.com [11.111.11.111]: 550 OU-002 (COL0-MC4-F27) Unfortunately, messages from LOCKED IP weren't sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors.
To unblock your IP address, write to this form :
- In the field "Contact name " enter your contact name.
- In the "Contact e-mail address " field indicate the address to which the technical support reply will come.
- In the "Outbound IP(s) or range(s) " field specify the blocked IP address of the mail server.
Mail.yandex.ru
Error:
Client host [LOCKED IP] blocked using spamsource.mail.yandex.net
To unblock the mail IP address, write to this form:
- In the field **"What in Yandex.Mail do you want to leave feedback about?
- In the "Your name: " specify your contact name.
- In the "Your e-mail address where we will send your reply: " specify the address where you will receive a reply from the technical support.
- In the "Message: " field you specify the blocked IP address of the mail server and what measures have been taken to remove spam from the server.
If you have any difficulties in configuration or have any additional questions, you can always contact our support service via [Ticket system] (https://fornex.com/my/tickets/).