IBM's 18-month company-wide email system migration has been a disaster,

https://www.theregister.com/2021/06/30/ibm_email_outage/

I sent you this link because I believe, for one reason or another, that it might
be of interest to you. My doing so DOES NOT MEAN that I agree with or endorse 
the
content of the link.
    Norman Shapiro