Addresses returning that response are invalid. They should be bounced and
suppressed from future mailing.
I have no idea why they chose 552, but the data shows that no one is home
at these addresses.
Luke
On Thu, Mar 11, 2021 at 2:26 AM Mawutor Amesawu via mailop <
mailop@mailop.org> wrote:
> A
A client has inquired about Yahoo/VMG providing [552 1 Requested mail
action aborted, mailbox not found] errors for bounced messages. Their
sending app normally expects 552 errors to be errors with attachments or
message size.
I understand the postmaster site indicates that any 5xx error should be
