Resending "opt-in" emails

I am contacting you in regard to a member we have tried to get entered into Sugar Hill Toastmasters club #4343169.  He is in TI and show in our membership with a line through his name.  I have tried several times to resend the opt in email and he never gets it.  I'm not sure how that works but I had a member from another club have the same issue, I resent the email and he was able to get in.  Can you help?  I don't think this part is anything TI can help with.  The person's name is Kevin Pittman, his email is kpittman@cityofsugarhill.com 

We are sending the emails and they are being accepted by Kevin's email service.
He needs to add server@toastmastersclubs.org and agenda@toastmastersclubs.org to his contacts and mail service whitelist.

The logs are below that show the email being accepted.Nov 23 17:13:06 toastmastersclubs sendmail[6901]: 2ANHD6oG006898: to=<kpittman@cityofsugarhill.com>, ctladdr= (501/502), delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=122252, relay=sugarhill.in.tmes.trendmicro.com. [18.208.22.78], dsn=2.0.0, stat=Sent (Ok: queued as 46F1210001AD2)
Nov 23 19:37:58 toastmastersclubs sendmail[31085]: 2ANJbvZg031082: to=<kpittman@cityofsugarhill.com>, ctladdr= (501/502), delay=00:00:01, xdelay=00:00:01, mailer=esmtp, pri=122252, relay=sugarhill.in.tmes.trendmicro.com. [18.208.22.78], dsn=2.0.0, stat=Sent (Ok: queued as 622CA10001AD6)