Hi Mailop, If we advertised (announced) IP space with a /20 CIDR via BGP for months, then stopped that advertisement for 7 days and re-advertised but with 2 different /21 CIDR ranges, would this produce a negative effect to our IPs reputation?
I would think that due to the previous /20 range being advertised (announced) on BGP this would be a moot issue, but wanted to reach out and inquire if the change in CIDR or the blackout 7 day period of no announcement would cause any issues with our reputation or acceptance of email from those IP ranges. Could this cause other issues I'm not thinking of? Thanks for your time and help. Ryan
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