Mac OS/X Mail

osx mail

Mail > Preferences…

osx mail - accounts - account information - edit smtp

Account Information

Outgoing Mail Server (SMTP): Edit SMTP Server List …

osx mail - smtp - account information

[+] Create an account

Account Information

Description: rsxxx.realsender.com
Server Name: rsxxx.realsender.com

TLS Certificate: None

[OK]

osx mail - smtp - advanced

Advanced

[  ] Automatically detect and maintain account settings

Port: 587 [x] Use SSL

Authentication: Password
[  ] Allow insecure authentication

User name: (the one we sent you)
Password: (the one we sent you)

[OK]

osx mail - accounts - account information

Account Information

Outgoing Mail Server (SMTP): rsxxx.realsender.com

Close and save the new settings

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