New Member not receiving opt-in request

Club Number 3802832. Website 3802832.toastmastersclubs.org. I added 2 new members around Oct. 12. One member received an opt-in email, but the other did not. I keep adding the second new member but he does not receive the opt-in request. I use Edge and Internet Explorer. I have an issue with Chrome and am not using it. I am really low tech and have no idea what version of browsers I am using, anything about browser caches or cookies.

I just sent another and I can see the email being sent and delivered. Have him check his gmail account and spam box.

Oct 28 16:02:12 toastmastersclubs sendmail[11282]: 09SG2CVs011279: to=<davidpremo@gmail.com>, ctladdr= (501/502), delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=122181, relay=gmail-smtp-in.l.google.com. [172.217.197.26], dsn=2.0.0, stat=Sent (OK 1603900932 j9si3000543qkk.16 - gsmtp)