Member email address “BAD”

Hi: I have used FTH for a few years and like it and find it user friendly.
We had a member join over a year ago and she had the same email address which we use in emails too - all good!
A few months ago she stopped receiving emails from FTH - all looks good but email checker says address is bad - double checked - all correct.
Deleted member and readded with same email address - opt in email was sent - she did not receive - resent - email checker still says email address is “BAD”
Please advise.

This is the email address in question:

karend@pacificsun.ca

Catherine
Club #1211
readersanddebaters.toastmastersclubs.org/

1) Never delete a member all her history has now been lost.
2) Your member hosts their email in a datacenter that spams FTH. I have removed the block for her mail server.
3) I sent her a test email and it shows she received

Sep 12 02:26:19 toastmastersclubs sendmail[4450]: 08C2QIpF004446: to=<karend@pacificsun.ca>, ctladdr= (501/502), delay=00:00:01, xdelay=00:00:01, mailer=esmtp, pri=122194, relay=mx-caprica.easydns.com. [64.68.200.41], dsn=2.0.0, stat=Sent (Ok: queued as 317642834D7)