I'm using Sendmail Version 8.14.4 on Centos 6.3. sendmail.cf of the Sendmail is left default of CentOS.
Sendmail does not output detail response message like below.
Aug 8 21:44:44 localhost sendmail: u78CicQr005073: email@example.com, delay=00:00:02, xdelay=00:00:02, mailer=esmtp, pri=120005, relay=mail.grandeur09.com. [184.108.40.206], dsn=5.1.1, stat=User unknown
On the other hand, Postfix can output detail response like below.
Aug 8 21:43:40 localhost postfix/smtp: EA843120806: to=, relay=mail.grandeur09.com[220.127.116.11]:25, delay=0.32, delays=0.01/0.01/0.28/0.01, dsn=5.1.1, status=bounced (host mail.grandeur09.com[18.104.22.168] said: 550 5.1.1 : Recipient address rejected: User unknown in local recipient table (in reply to RCPT TO command))
The below message is important for me.
User unknown in local recipient table (in reply to RCPT TO command))
Do you know how to output detail response message returned by downstream SMTP server?
I tried to raise log level, but it was useless.