This error appears when the domain in the from address does not match the domain being used to authenticate to the outgoing mail server.
For example, if the mail client signs in using a mailbox on one domain, the sender address must normally use that same domain.
To fix the problem, update the sender address so it matches the authenticated mailbox domain, or change the SMTP login so it matches the address you want to send from.
This error usually appears when an email client tries to send a message before completing SMTP...
This error can appear when sending email from a mail client that is not configured to use SMTP...
This error normally indicates that the sender address or domain has been blocked because of a...
This error is usually returned when a remote SMTP server attempts to deliver email to Webby mail...
Most email setup problems are caused by one of a few common mistakes: Using the wrong incoming...
