Error: "553 5.7.2 [TSS09] All messages from x.x.x.x permanently deferred" when sending email to Yahoo Mail

Support and Discussion General Discussion
1

hey everyone this is my first time posting but I’m really Struggling with yahoo delivery
for the last 4 months I received this error message frequently when sending email campaigns

Error: “553 5.7.2 [TSS09] All messages from 79.99.28.252 will be permanently deferred; Retrying will NOT succeed. See https://postmaster.yahooinc.com/error-codes” while connected from jesepe.uneafuseauean.xyz (79.99.28.252) to mta5.am0.yahoodns.net (67.195.204.74)

I tried every method / solution and best practices and nothing works !!

so if anyone have the same problem or have the solution ill be appreciate

2

You use harvested, bought or random found from net mail lists?

3

I use harvested

4

That’s why you get blacklisted.

5

yes and I delisted all the Ips
the problem is when I test a new Ips i get the same error with all Ips and domains Whitelisted not a single one is blacklisted
i changed the severs provider and i still got the same Error