Re:Postal: Open source mail delivery platform, alternative t...
by tyingq on Wednesday April 26, 2017 @08:43AM
(#14202449)
The term to search for is "RBL" (real time blacklist). Search for "check rbl" to find interactive sites, or maybe "check rbl github" for code that you can use yourself (though you may have to sign up for several services if you go that route).
Neither, though, helps with checking if one of the big providers, like Google, would not like your IP. For those, you have to send an email and watch/parse the SMTP error responses.
Neither, though, helps with checking if one of the big providers, like Google, would not like your IP. For those, you have to send an email and watch/parse the SMTP error responses.