SMTP rejected because of ban by Spamhaus

[tpimh]

I tried validating a number of email addresses using this library, and everything was fine at first, but after some time I started getting validSmtp: null and debug showed the following types of messages:

Mailbox: got data 550 5.7.1 Service unavailable, Client host [xx.xx.xx.xx] blocked using Spamhaus. To request removal from this list see ... (outlook)

Mailbox: got data 550 5.7.1 Mail from IP xx.xx.xx.xx was rejected due to listing in Spamhaus SBL. For details please see ... (icloud)

Is there a good way to prevent getting into Spamhaus blacklist while using this library?

[angle319]

Actually, this action is like the package.
There is no other way bypass spam block list unless you build your own mail server with it's own ip.

[tpimh]

Thanks for your reply. In fact I have built my own mail server with a dedicated IP, and the problem was that this IP was constantly added to the blacklist when using this library. I don't know if there's any good email validation method that doesn't make such request that are detected by Spamhaus as malicious.