not because of copy
not because of subject lines
because most of them never actually reach inbox consistently
I kept seeing this pattern:
same list
same copy
same setup
some days replies come in
other days everything dies
no clear reason
people say “test more”
but that feels like guessing
the more I looked into it, the more it felt like:
we’re optimizing emails that might not even be seen
curious if others here have seen this
have you had campaigns where nothing changed but results dropped?
This reminds me of something similar on the dev side.
When using AI tools, I noticed different models often give different outputs for the same input.
It makes it hard to know what to trust without double-checking everything.