Hi,
We are Qboxmail, an Italian mailbox hosting provider. We provide only
B2B mailboxes exclusively to companies and do not offer free email accounts.
I am writing here because I need your help with a deliverability issue
affecting Yahoo mailboxes. Starting from September 17th all our SMTPs
were blocked by Yahoo:
status=bounced (host mx-eu.mail.am0.yahoodns.net[188.125.72.73] said:
553 5.7.2 [TSS09] All messages from 185.97.217.40 will be permanently
deferred; Retrying will NOT succeed. See
https://postmaster.yahooinc.com/error-codes (in reply to MAIL FROM
command))
dsn=5.7.2, status=bounced (host mta7.am0.yahoodns.net[67.195.204.74]
said: 553 5.7.2 [TSS09] All messages from 185.97.217.41 will be
permanently deferred; Retrying will NOT succeed. See
https://postmaster.yahooinc.com/error-codes (in reply to MAIL FROM
command))
dsn=5.7.2, status=bounced (host mta6.am0.yahoodns.net[98.136.96.74]
said: 553 5.7.2 [TSS09] All messages from 185.97.217.43 will be
permanently deferred; Retrying will NOT succeed. See
https://postmaster.yahooinc.com/error-codes (in reply to MAIL FROM command))
All our IPs 185.97.217.0/24 seems blocked by Yahoo.
I filled out the support form on their website, but nothing has changed.
It’s very strange because we’re only having this problem with Yahoo; our
IPs aren't on any other major blocklists.
We’re facing serious issues because of this block.
What can we do?
Thanks
--
Alessio Cecchi
postmaster AT qboxmail
https://it.linkedin.com/in/alessice
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