Error 550 Email blocked by b.barracudacentral.org

nikita_wets

I am trying to send a message to @diat.ru , but error 550 is coming. Added the enabling rule to the file data/conf/postfix/custom_postscreen_whitelist.cidr

Error:
host mail.diat.ru[91.230.208.129] said: 550 Email blocked
by b.barracudacentral.org (in reply to RCPT TO command)
Diagnostic-Code: smtp; 550 Email blocked by b.barracudacentral.org

custom_postscreen_whitelist.cidr :
91.230.208.129 permit

nikita_wets

I checked it on the https://mxtoolbox.com/SuperTool.aspx?action=blacklist%3A138.197.150.59&run=toolpage website and removed it from the black list. After that it worked