Emails not being sent out #3

I'm getting Bounce backs:

Your message to (nbarikpoa@yahoo.com in members-3599501@toastmastersclubs.org) had the following error and was not delivered (7 retries):
Couldn't connect to toastmastersclubs.org:25

Hello.
I have the same problem as agenda is not being emailed out.

Club number is 6345. Please check as confirmation and logo is clearly visible after send.

Thanks

Russell
VPPR

yes it looks like you sent it twice

Jul 7 21:58:34 toastmastersclubs sendmail[17470]: s67LwLw3016931: to=<rjedw@live.com.au>, ctladdr= (501/502), delay=00:00:12, xdelay=00:00:00, mailer=esmtp, pri=128760, relay=mx4.hotmail.com. [65.55.92.152], dsn=2.0.0, stat=Sent ( <201407072158.s67LwLw3016931@toastmastersclubs.org> Queued mail for delivery)
Jul 8 00:52:32 toastmastersclubs sendmail[9607]: s680qQj5009419: to=<rjedw@live.com.au>, ctladdr= (501/502), delay=00:00:06, xdelay=00:00:01, mailer=esmtp, pri=128824, relay=mx3.hotmail.com. [65.54.188.126], dsn=2.0.0, stat=Sent ( <201407080052.s680qQj5009419@toastmastersclubs.org> Queued mail for delivery)

Thanks for the response and confirmation of the send but what do I need to do to solve the problem please?

We are seeing some high email volumes on Mondays that slows down the email sending.

You may need to send the email again. Sorry.

We are working to better handle the increased email volume.