I have debian server with postfix and roundcube. After an attack we are on 2 blacklists, but I don't think that this is the main problem. I can't send mail to any address. I tried to find the cause...I checked var/spool/postfix/etc/resolv.conf and resolv.etc and they're the same with this content:
nameserver 127.0.0.1 nameserver localhost
In var/log/mail.err I found:
cyrus/imap: DBERROR: opening /firstname.lastname@example.org: cyrusdb error cyrus/imap: DBERROR: skiplist recovery /email@example.com: ADD at 1FC0 exists
When I try to send email from roundcube, I get the message from title. When I send it within opera or any other mail client, It gives nothing, but email is'nt sended. Thank you for any advice.