Viewing articles tagged 'SMTP'
503 valid RCPT command must precede DATA Error occurs when the mail client attempts to send an...550 From domain must match authenticated domain
550 From domain must match authenticated domainA 550 From domain must match authenticated domain...550 Sender is not allowed
550 Sender is not allowedA 550 Sender is not allowed error occurs when a sender or domain name...Server settings used for incoming and outgoing email accounts
This knowledge base article applies to all email accounts hosted on our Windows Hosting...