There is a problem. The client works with the mail server via SMTP. It tries to send a letter, but it gives an error:
Rejected because 95.xxx.xxx.xxx is in a blacklist at zen.spamhaus.org.
This is very strange. How can I disable the IP address check of the client that sends mail via SMTP but not disable the blacklist check for incoming mail?
Is it possible that this behavior is caused by the fact that the domain name has the Remove spam checkbox checked?
If the client authenticates itself when using smtp to send mails (to be able to authenticate it must use STARTTLS or TLS), it won’t be rejected by any of the DNS block lists.
If the ip doesn’t change, you can add it to whitelist file:
/etc/exim4/white-blocks.conf