UnixServerAdmin

Server Administration & Management

How to fix for Invalid SMTP response received from host

Issue:- I saw the warning “Invalid SMTP response received from host” in one of our server. Even after restarting the exim the warning was still showing up .

Fix:- After the investigation the issue I checked that connections to exim was very high around 100. So,I have set smtp_accept_max_per_host = 10 in exim.conf and I also increased smtp_accept_max = 100 to 150 which has resolved the issue .

The changes made in /etc/exim.conf file are:-

# vi /etc/exim.conf

=======================
smtp_accept_max_per_host = 10
smtp_accept_max = 150
=======================

August 6, 2011 Posted by | Exim | , | Leave a comment