4 ms·

When it is blacklisted, the user/owner of the IP must go to each "anti spam" provider that blacklisted the IP. I.e. spamhaus, they have a page[1] to check if an

by zakki 2y ago

When it is blacklisted, the user/owner of the IP must go to each "anti spam" provider that blacklisted the IP. I.e. spamhaus, they have a page[1] to check if an IP is blacklisted as well as asking to remove the IP from blacklist. [1] https://check.spamhaus.org/ https://check.spamhaus.org/

razemio 2y ago
Yep, this did not work. I tried for several years. The only thing that worked was manually filling out the required forms. Not sure if it changed lately. Out of the self host mail business for some years.
kazinator 2y ago
Some blacklists say "this is a residential subscriber IP". Some mail servers block based on that. An IP cannot be removed from such a database. https://www.rbl-dns.com/dul https://www.rbl-dns.com/dul I drop SMTP connections from servers that simply do not have matching forward and reverse DNS. This rule eliminates like 90% of spam. It's a good rule and I won't make any exceptions. There's no way to contact me. Your bounce message tells you what you have to do: get your DNS ducks in a row.
- ZPrimed 2y ago
  ... and that's nearly impossible if you're on a residential connection and hence have no control over your reverse DNS... And who wants their mail server to self-identify as d203-0-113-5.res.fubar.isp.net ? That's assuming your residential ISP even bothers to assign a generic PTR record to your IP.
zimpenfish 2y ago
> the user/owner of the IP must go to each "anti spam" provider that blacklisted the IP. Even that doesn't work all the time. hotmail is currently bouncing emails from me[0] even though Microsoft's own sender reputation thing[1] says my IP is in good standing. [0] with a link to [1] just to rub it in.
eikenberry 2y ago
What finally forced me to switch to a 3rd party for SMTP (outgoing) was a blocklist (UCEPROTECT I think) that required you to pay to be removed and my mother-in-law's email provider (AT&T) used it. My wife couldn't email her mom which was a no-go.

by zakki 2y ago

razemio 2y ago

Yep, this did not work. I tried for several years. The only thing that worked was manually filling out the required forms. Not sure if it changed lately. Out of the self host mail business for some years.

kazinator 2y ago

Some blacklists say "this is a residential subscriber IP". Some mail servers block based on that. An IP cannot be removed from such a database. https://www.rbl-dns.com/dul https://www.rbl-dns.com/dul I drop SMTP connections from servers that simply do not have matching forward and reverse DNS. This rule eliminates like 90% of spam. It's a good rule and I won't make any exceptions. There's no way to contact me. Your bounce message tells you what you have to do: get your DNS ducks in a row.

ZPrimed 2y ago
... and that's nearly impossible if you're on a residential connection and hence have no control over your reverse DNS... And who wants their mail server to self-identify as d203-0-113-5.res.fubar.isp.net ? That's assuming your residential ISP even bothers to assign a generic PTR record to your IP.

zimpenfish 2y ago

> the user/owner of the IP must go to each "anti spam" provider that blacklisted the IP. Even that doesn't work all the time. hotmail is currently bouncing emails from me[0] even though Microsoft's own sender reputation thing[1] says my IP is in good standing. [0] with a link to [1] just to rub it in.

eikenberry 2y ago

What finally forced me to switch to a 3rd party for SMTP (outgoing) was a blocklist (UCEPROTECT I think) that required you to pay to be removed and my mother-in-law's email provider (AT&T) used it. My wife couldn't email her mom which was a no-go.