My domain getting lot of spam mail like xxx@mydomain.com, yyy@mydomain.com. We don't have such user's but we getting mails like that.Also getting lot of bounce mails, How to control spam like this in exim mail server.
Incoming Spam Mail in exim mail server
exim
If you use postmaster option    require verify = recipientThis statement requires the recipient address to be verified; if  verification fails, the address is rejected.See Default ConfigurationYou can also set some good acl rules to delay or block the host which sends the spam:   deny  message         = Max $rcpt_fail_count failed recipients allowed         condition       = ${if >{$rcpt_fail_count}{10} {1}}         ! verify        = recipient         delay           = ${eval: $rcpt_fail_count * 10}s         log_message     = $rcpt_fail_count failed recipient attemptsSee FAQ