> Sorry , Error what im getting is *"421 Too many concurrent SMTP connections*" not the
> 421 SMTP command timeout - closing connectionWhat i mention in the subject by mistake
Exim is seeing too many concurrent SMTP connections - you should be able to verify this via netstat, and it might be worth seeing if there is anything in your config (malware/spam scanning etc) causing this to take a significant amount of time. On the other hand, it might be spammers :)
You can increase via the global section of exim.conf (essentially top of main config):
Ie:
smtp_accept_max = xxxx
smtp_connect_backlog = xxxx
Chris
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