I've run into this same issue communicating with potential employers via GANDI mail--more often then not when I make a followup call my email is in their SPAM f

I've run into this same issue communicating with potential employers via GANDI mail--more often then not when I make a followup call my email is in their SPAM folder. My sister-in-law's employer's mail service (k-12 school district) ALWAYS bounces back email from myself and my wife, and their sysadmin always says "Nope. Not a problem on my end."