Some recent difficulties with email lists

Hello,

We have had two issues recently with our club emails:

1. When we send out a meeting agenda to the club via our club website, everyone gets a bounceback message for one of our members' email address. The email message we get is as follows. I have contacted the email address blinquiry@cv.net, as suggested below, but wanted to check if this was a known problem at FTH.

The original message was received at Mon, 10 Feb 2014 15:06:18 GMT
from toastmastersclubs.org [127.0.0.1]

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The following addresses had permanent fatal errors

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<lquint@optonline.net>
(reason: 550 5.7.1 Your mail from 50.19.253.65 was rejected. We can't currently accept your message. Please ...inquiry@cv.net. Be sure to include this rejection message and any other data that might be relevant.)

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Transcript of session follows

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... while talking to mx2.optonline.net.:
>>> MAIL From:<agenda@milesquare.org> SIZE=9926
<<< 550 5.7.1 Your mail from 50.19.253.65 was rejected. We can't currently accept your message. Please contact blinquiry@cv.net. Be sure to include this rejection message and any other data that might be relevant.
554 5.0.0 Service unavailable


2. Our second problem concerns email inquiries to the club from prospective guests. These email inquiries from our site usually go to three people: the president, with the VP Ed and VP Membership in Cc. In the last month or so, these inquiry emails have only gone to the president, and no settings have been changed.

optonline.net is blocking emails from us nothing we can do you need to talk to them.

Feb 10 15:06:20 toastmastersclubs sendmail[17791]: s1AF6Icq017787: to=<lquint@optonline.net>, ctladdr= (501/502), delay=00:00:02, xdelay=00:00:02, mailer=esmtp, pri=129443, relay=mx2.optonline.net. [167.206.4.79], dsn=5.0.0, stat=Service unavailable
Feb 10 15:06:27 toastmastersclubs sendmail[18281]: s1AF6R3B018233: to=<lquint@optonline.net>, ctladdr= (501/502), delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=132261, relay=mx1.optonline.net. [167.206.4.77], dsn=5.0.0, stat=Service unavailable

The emails are being send to your contacts. Please have them check their spam/junk boxes

Feb 10 16:29:51 toastmastersclubs sendmail[26960]: s1AGSnhb026947: to=<ngoclan.man@gmail.com>,, ctladdr= (501/502), delay=00:01:02, xdelay=00:00:01, mailer=esmtp, pri=180937, relay=gmail-smtp-in.l.google.com. [173.194.76.26], dsn=2.0.0, stat=Sent (OK 1392049790 v62si10390867qge.28 - gsmtp)