Comment Re:No customer notification (Score 1) 495
Even if you were using one or some of the affected domains still this is the type of service where most customers just won't notice any problem, even if they would be technically counted in the millions from TFA.
Such notification has less operational importance and more PR/image. They might send one eventually, once dust settles.
PLUS
Alert: Email communications to your email address on file recently bounced. Please update your email address on file.