Raafat Mohamed

Senior Linux Administrator

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in Exim
May 17, 2012

421 Too many concurrent SMTP connections; please try again later.

When trying to end an emails from squirrelmail ,I got the following message : ERROR:Message not sent. Server replied: Service not available, closing channel 421 Too many concurrent SMTP connections; please try again later. It means that there are to many open SMTP connections either incoming or outgoing.The default is 20, you can raise that […]

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in Exim
April 7, 2012

Changing Exim’s Sending IP

Anyone running a shared hosting server is probably now accustomed to dealing with constant complaints about blacklisting. It’s exim’s default setup on a cPanel server to use the shared IP of the server to send email, which means that all your clients on one server are sending out email on the same IP.  All it […]

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in Exim
February 12, 2012

Exim useful commands..

1) To Print a count Of Messages in the queue:- #root@xeon [~]# exim -bpc 3506 Here 3506 mails are in the queue. 2) Command To List All The Messages In The Queue.(Time, Size,Message ID,Sender,Receipient):- #root@localhost# exim -bp Other Options:- root@localhost#exim -bpru If you want to list for the message for a particular domain issue the […]

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