new members not receiving opt-in emails

Greetings from Elkridge Speakers Club, #5902. We have three new members who are not receiving opt-in emails. Is there a reason this could be happening? I have sent multiple times, asked them to check the email addresses I have entered, and to check trash and spam. Because there are three of them, I am thinking there is a glitch somewhere or something I'm doing wrong (though I don't remember this happening before.)

Thanks for your help!

They all seem to have different issues:
Aimee - "Invalid/Bounced Out Recipient Email Address; 5 Retries." Is her address correct? Perhaps a .org rather than .com ?
Adele - "stat=Sent" - this usually means it has been sent to her provider - could be in her junk mail folder, or she needs to make @toastmastersclubs.org a safe sender
Pamela - "Queued mail for delivery". I think this could be a hotmail issue - please also ask her to set @toastmastersclubs.org as a safe sender
Please refer to this documentation for support.toastmastersclubs.org/doc/item/e...embers-receive-email
 

aimee.miller@fulbrightmail.com is not a valid email address.

adeledevoe@yahoo.com make sure they add server@@toastmastersclubs.org and agenda@@toastmastersclubs.org to their contact list

pirvinewilliams@hotmail.com make sure they add server@@toastmastersclubs.org and agenda@@toastmastersclubs.org to their contact list

make sure Adele and Pamela check their spam junk folders

You were right on! And all three are now in our system and on their way. (It took a little time to finish this out on our end because one of the three has been out of the country.)

We so appreciate your help.

Thank you for the detailed response! All three are now in our system and ready to go.