Sendmail gethostbyaddr error
Disable DNS Lookup
/etc/mail/sendmail.cf
#O ServiceSwitchFile=/etc/mail/service.switch
註解移除 =>
O ServiceSwitchFile=/etc/mail/service.switch
/etc/mail/service.switch
hosts files
aliases files
補充一:如果要關閉的話, 得移除/etc/mail/service.switch
補充二:
另一種設定方式
hosts dns files
aliases files
