Error:- Nov 11 17:09:43 server postfix/smtp[30572]: certificate verification failed for aspmx.l.google.com[74.125.200.26]:25: untrusted issuer /OU=GlobalSign Root CA – R2/O=GlobalSign/CN=GlobalSign Nov 11 17:14:31 server postfix/smtp[3332]: certificate verification failed for in.hes.trendmicro.com[54.219.191.21]:25: untrusted issuer /C=BE/O=GlobalSign nv-sa/OU=Root CA/CN=GlobalSign Root CA Nov 11 17:19:32 server postfix/smtp[5333]: certificate verification failed for mx6.mail.icloud.com[17.133.229.15]:25: untrusted issuer /C=US/O=GeoTrust Inc./CN=GeoTrust Global CA Nov 11 17:19:35 server postfix/smtp[5333]: certificate verification failed for mx5.mail.icloud.com[17.133.229.14]:25: untrusted issuer /C=US/O=GeoTrust Inc./CN=GeoTrust Global CA Solution:- You need…
1) Add a line to your main.cf Code: header_checks = regexp:/etc/postfix/header_checks 2) Create a new file, /etc/postfix/header_checks Code: /addresstoblock@yourdomain\.com/ DISCARD 3) Restart service /etc/init.d/postfix restart