[CentOS] slow sendmail going out

Jerry Geis geisj at pagestation.com
Wed Apr 27 19:02:06 UTC 2011


Jerry Geis wrote:
> I am trying to find a way to "speed" up sendmail going out of my box.
>
> I am setting SMART_HOST. Dont get me wrong email does go out it just 
> takes
> like 3-4 minutes to get there.
>
> When I do "mail xxxx at y.com" and send it the /var/log/maillog file shows
> the connection and shows the relay as [127.0.0.1]. Then it just SITS 
> there for a long time.
>
> Then it picks up the mail and delivers it. No errors are show, no 
> timeouts etc...
>
> My box does not have an MX record as  I am behind the firewall 
> (192.168.1.X).
>
> I have set the /etc/sysconfig/sendmail QUEUE=1m but that does not seem 
> to help either.
>
> There is nothing else happening on my box so that is not slowing 
> anything down.
>
> I've done some google'ing, some playing and nothing has helped. I 
> tried adding the service.switch
> to sendmail.mc, I tried temporarily taking out dns from nsswitch.conf 
> - and nothing seemed to help.
>
> How can I get emails exiting my box faster.
>
> Jerry
>
Gregory - Thanks for the DNS info.

Another avenue I just tried was setting up AuthInfo with a user and 
account and that goes much faster now also.
Perhaps loging in to the email server by passes any DNS lookup it was 
trying to do.

Thanks,

Jerry



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