Client POP and SMTP blocked by Blacklist
Problem reported by Sérgio Rocha - 1/30/2020 at 12:35 PM

We have a client that cannot connect via POP because the IP he received from his ISP is blacklisted.
Wasn't spam lists supposed to only be validated for non-authenticating SMTP connections?


2 Replies

Reply to Thread
Matt Petty Replied
Employee Post
Spamlists are only used for spam filtering. Technically the server sending out is your server ip. SmarterMail does have a blacklist for inbound connections but this manually modified by system administrators and automated systems like intrusion detection. This is the only system that would prevent an IP from connecting to POP.

Do you see a log entry for their IP in the POP logs?
Matt Petty
Software Developer
SmarterTools Inc.
(877) 357-6278
Sérgio Rocha Replied
Hi Matt,

No, we dont have any automated system.
We saw in the logs the report of block by blacklisted, and then we notice that the blocked IP is the client IP.
Only after we white-list the IP the pop connection worked.

Our SM is the 7242


Reply to Thread