Hi,
We have O365 subscription and using MS Exchange for email accounts. Frequently, we get spam emails from Gmail, so if we block emails using their source IP then all emails from Gmail will stop getting through, but if we stop them by email address then they are always new (different) and numerous which makes it practically difficult to stop. Has anyone faced such situation and found any effective and simple solution to stop spam from Gmail.
Any help in this regard will be highly appreciated.
Thank you,
Sajid