Error 530 validating sender
If the sender is outside of your organization - Configure the recipient or your mail servers to accept mail from external or anonymous senders.
When external users try to send mail to mail-enabled public folders in Office 365 - When external users try to send email messages to mail-enabled public folders in Office 365, they receive an NDR that contains the following error code: Remote Server returned ' If the sender is outside your organization and their email server IP address has been put on Microsoft’s blocklist - In these cases, the NDR the sender receives would include information in the Diagnostics for administrators section similar to this: 5.7.1 Service unavailable; Client host [xxx.xxx] blocked using Blocklist 1; To request removal from this list please forward this message to [email protected] the NDR message to [email protected]
Generally, the error indicates that your organization has a security setting for emails that is preventing your message from reaching the recipient.
It might be one of the following problems: Most of the time, you probably won't be able to fix this problem on your own.
If you don’t know the group’s owner, you can find it by doing the following in either Outlook Web App or Outlook.
To resolve the issue, join the group, or ask the group’s owner or moderator to approve your message.
This can include reconfiguring settings for the recipient, distribution group, organization, or domain.
For more information about verifying your SPF record, see Customize an SPF Record to Validate Outbound Email Sent from Your Domain.If you are on the SBS version your check should include all those pre-defined receive connectors, even the one named "SBS fax".Thanks, but I've eliminated this option as the first step.Today a client called me and she couldn’t get her brand new Windows 8 to send mail thru Go Daddy’s SMTP server.She was getting mail just fine, but no outbound mail.
Search for error 530 validating sender:
To understand and see the your mail server response , you will need to open telnet session to your mail server and use standard SMTP commands to see the mail server response and what is going on so you can remedy the problems.