What does IP address whitelisting mean?

IP address whitelisting in email marketing means adding a sender’s IP address to a recipient’s approved list, allowing emails from that IP to bypass spam ﬁlters. It helps ensure reliable delivery, especially to corporate or strict email servers, and improves trust and inbox placement for consistent, legitimate senders.

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Related Articles
What does a shared IP address mean?
In Zoho Campaigns, a shared IP address means multiple users send emails from the same IP. This setup shares sender reputation, so your email deliverability can be affected by other users’ sending behavior and practices.
How might your IP address get blacklisted?
Your IP address may get blacklisted due to high spam complaints, poor list hygiene (invalid emails), low engagement, or improper email authentication (missing SPF/DKIM). Other causes include high bounce rates or sharing an IP with spammers. ...
Will IP address whitelisting help email delivery?
Yes. IP address whitelisting helps improve email delivery by allowing emails to bypass spam ﬁlters, reducing the chances of being blocked or sent to junk folders, especially on strict mail servers.
How can I check my IP address blacklist status?
To check your IP address blacklist status, use MXToolbox. Go to mxtoolbox.com, enter your IP address in the search bar, and select “Blacklist Check.” MXToolbox will scan and display whether your IP is listed on any blacklists. Review the results and ...
Why am I receiving an IP address blacklist error message?
An IP address blacklist error in Zoho Campaigns occurs when the sending IP is ﬂagged by spam ﬁlters or blacklist services, often due to high spam complaints, poor email authentication, or low sender reputation. To resolve it, check blacklists, ...