We have recently imported our DB from SendinBlue to Klavyio.
While sending our first newsletter, we got around 30 postmaster emails to notice undelivered emails + 400 hard bounce. That is alot, we didn’t have that before in SendinBlue.
I went into our DB to remove these, but the strange thing is that these 30 emails address (which generated postmaster) are UNKNOWN and IMPOSSIBLE to find in our DB.
I therefore DONT UNDERSTAND how this is possible?
Can somebody help me?
Best answer by cassy.lee
Just wanted to follow up on this thread in case anyone else finds a similar problem. We’ve identified the root cause as an automatic forward from a recipient to another email address. Klaviyo only records the original delivery, and not the subsequent bounces since that second profile isn't even in our system. These bounces would not affect your deliverability.