I think spamdyke implements greylisting by sending a 421 Temporary
Failure code on first connection. That might be what's happening here.
Greylisting is off by default, but if you have it turned on you could
set `graylist-level` to `none` to turn it off. If you want to keep it on
but just fix it
What log file are those messages from? Are they from '/var/log/maillog'?
If so, you might look at /var/log/qmail/smtp/current to see if it offers
anything you can use. On my system, spamdyke lines in that log include:
origin_ip: 1.2.3.4
so if these attacks cause text to be written to
On 2015-06-22 11:55, Alessio Cecchi via spamdyke-users wrote:
one sender (and only this one) is unable to send email to my users,
this is the error in spamdyke log:
Jun 22 05:47:37 mx01 spamdyke[1066]: DENIED_OTHER from:
i...@domain.net to: j...@domain.com origin_ip: 98.18.75.3 origin_rdns:
