in the meantime, we are receiving more and more complaints from our customers that too many emails are no longer arriving.
I have noticed that many previously problem-free and unblocked emails are blocked by RBLs.
After I removed the RBLs, all "correct" emails come through again.
This problem first occurred about four weeks ago.
I am wondering why the RBLs are suddenly sporadically rejecting emails that have been coming through flawlessly for years.
Has anyone else here encountered such a problem?
Concerns various SOPHSO XG and XGS models.
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