N/A

Outlook 2016 outgoing mail server fails to connect: "550 5.1.0 sender rejected"

Any help appreciated:

 

when sending mail in outlook 2016, the server responds with "550 5.1.0 sender rejected".

Below are the settings used.
Note: Incoming mail is working fine.

POP settings:
Account Type: POP or POP3
Incoming Mail Server: mail.twc.com
Incoming Server - POP3 port: 995
Outgoing Mail Server (SMTP): mail.twc.com
Outgoing Server - SMTP port: 587
Inbound & Outbound User Name: Enter full email address
johndoe@[division].rr.com

Inbound & Outbound Password: Email Password (same as Web Mail)
SMTP Server Requires Authentication: Checked

1 REPLY
Participant

Re: Outlook 2016 outgoing mail server fails to connect: "550 5.1.0 sender rejected"

I am using Outlook Express.

My incomming Port (POP3) is Port 110 not Port 995.

Otherwise, my settings are the same as yours and my incomming and outgoing eMail  is working ok.