Cannot send a mail due to smtp authentication.
Issue
- Our customer encountered that smtp authentication failed.
sendmail(MTA):RHEL Mail server
------- TCP connection establishment --->
<----- 220 ESMTP Service ready ----------
------ EHLO ... ------------------------>
<----- 250- ... 250-AUTH=LOGIN... -------
------ MAIL From:xxx AUTH=xxx --------->
<----- 505 Authentication required ------
- Authentication request of RHEL may be incorrect, so we tried followings but any way did not resolve.
Environment
- Red Hat Enterprise Linux 5
- sendmail
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