Hi,
I installed a new instance of my e-mail platform for a customer of my
company but a very strange things happens during the warm up of the new
sending IPs.
Quite all the IPs (Assigned us directly from the RIPE) got a sender
score of 0 instead of the usual 96 -> 98 range.
Fortunately, few of them are on 97 as expected.
No blacklist have been achieved and no bad indicators are present after
a couple of months of consistent sending.
We are correctly deactivating permanent bounce and feedback loops as well.
The 97 score IPs has the real sender domain linked to the IPs on
senderscore (as it happens usually).
The 0 score IPs hasn't any sender domain linked, in some cases they have
the platform domain as unique sender linked (that is not a sender in any
way and is not used as any sender in the e-mail sent, nor in return-path).
Every sending host/IP is sending mail from 5 well known sender in a
round robin schedule (so they should achieve quite all the same
reputation but it doesn't happens) actually the rate is the same and
it's quite low (7,5k/IP/day).
Every IP/host is a clone VM so thgey are exactly the same except for IP
and host name; every host has the same DNS/PTR/SPF/MX configuration.
Every sender sign the e-mail with his DKIM and has the Sender-ID (SPF)
record over the sender domain.
The deliverability cut off is from 90% of the 98score to the 30% of the
0 score and they are sending exactly the same things/amount/databases.
Anyone experienced this kind of issue?
Can someone share any sender-score contact on order to verify this issue
with them?
Thank you guys!
Stefano
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