Why do some hosts block port 25 on 'clean' IPs

Got a new /29 from Hetzner. Spotless history. No spam, no blacklists. Port 25 blocked at upstream level. Support says "policy." What gives? This is standard VPS tier, not residential.

Basically I just need to relay alerts from my monitoring stack to my own mail gateway. Not running a mail service. Sorry if this is dumb, sir/ma'am, but I checked all the RBLs and my IP is clean please help. Never had this issue with my old provider.

Is there an appeal process? What do I tell support to escalate? I used https://mxtoolbox.com/blacklists.aspx to verify — anything else I should check? Please help and thank you.

Basically I thought clean IPs meant clean, like, everywhere? Please help. My old provider never did this and I checked teh RBLs like ten times. Is there a form or something I can fill out sir/ma'am? Basically I just need alerts for my homelab please help.

The upstream dont care. Contabo did same to me on a €4/mo VPS. Had to pay €5 extra for "mail enable". A lot of hosts do this now. Definitely check if Hetzner has a paid unblock. Im on Vultr now, $3/mo, port 25 works but they receive complaints fast.

Now the upstreams—Level3 types, the real carriers—pressure hosts into blanket blocks because it's cheaper than handling abuse tickets. Kids these days think "clean" means a Spamhaus lookup, but the blocklists don't matter if the ASN itself is flagged as "consumer grade." Mark my words: within five years port 25 will be a paid add-on everywhere, if it isn't already.

Your appeal letter needs to cite:

• Your use case
• Your domain's age
• Your willingness to accept liability

I've written dozens. Most fail. The ones that work go to a human at the NOC, not the front-line support drone reading from a script.