Reports have been trickling in today that senders are seeing spikes in “Bad” reputation in Google’s IP Reputation Postmaster page. In checking my own instance, I found at least 3 major senders whose IPs have been 100% Good for months, then 75% or more in the Bad status for July 3rd.

The results appear to be spotty, but multiple industry folks have mentioned seeing similar behavior in popular forums today. No official word from Google yet, but we’ll keep an eye on this and update as news comes in.

UPDATED 1:45PM EST – After further analysis, deliverability to Gmail does not seem to be affected for clients I’ve checked, and a few others have reported the same. Domain reputation also appears to be unaffected for me, but some others have reported changes in domain reputation that may or may not be related. In any case, these blips certainly lend credence to the loudly-whispered theory that major US holidays wreak havoc on GPT data, with yesterday being Independence Day here in the States.