May 23 07:51:55 eol postfix/smtp[12437]: BFB7E567: to=<zhengkun2665@bayou.com>, relay=mxfilter.bayou.com[209.209.192.75]:25, delay=37793, delays=37767/0.09/26/0, dsn=4.0.0, status=deferred (host mxfilter.bayou.com[209.209.192.75] refused to talk to me: 554 Service unavailable; Client host [158.250.17.73] blocked using ru.countries.nerd.dk; Your IP is in ru, rejected based on geographical location)
Не расслабляться!