Some Outlook users have reported that they are unable to send email from the app as when doing the same, they receive Error 503 stating that the Valid RCPT command ...

Sending email messages from your iPhone uses a different server connection than receiving email. Because of this, your iPhone can sometimes receive email but be unable to send it. Settings for ...

I work for an ISP and occasionally deal with customers who swear up and down that they need *our* outgoing email server to make email that we do not host or provide work. Example: Customer has ...

Some PC users when they try to open the Outlook email client on their Windows 10 device, they encounter the error message The server configuration prevents you from ...