Microsoft Dynamics NAV (Archived)

Client does not have permissions to send as this sender

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Posted on by pawar.rajendra88@gm...

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Hi All,

7610.Error.PNG

Hi All ,

I have done the SMTP setup in navision 2013 r2, but when trying to send email then "The SMTP mail system returned the following error: "Mailbox unavailable. The server response was: 5.7.60 SMTP; Client does not have permissions to send as this sender" error showing." error showing. but when send email from email id which is configure in SMTP setup that email send without error,But different email id with same domain not allowed to send email.

SMTP setup

SMTP server-> outlook.office365.com

SMTP Server Port-> 25

Authentication> Basic

UserID-> ser.admin@school.com

password-> *******

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Alexander Ermakov 28,096 on at

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Configure "Send As" permission on your mail server so that agent accounts can send email as your outbound mailbox account: support.microsoft.com/.../2572646

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Hi Alexander,

I have gone throught the link which you have provided and I did not happen to get any detailed information. Can you please provide any steps on how to do this in the latest office 365 ?

Thank you

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Suresh Kulla 50,243 Super User 2025 Season 2 on at

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Have you tried different authentication types in the setup ?

Please do check this link

https://community.dynamics.com/nav/f/34/t/228318

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Community Member on at

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Thanks for your response.

There was no Email id defined in the approval user setup.

Can you explain what do you mean by "different authentication types in the setup"?

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mmv 11,471 on at

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Different types of Authentication Types:-

Anonymous Authentication is a mechanism that will allow any connection to the Exchange server.

For e.g an external user will not be able to authenticate to send or receive email.

Basic authentication allows user names and passwords to be sent across the network in clear text. Without encryption, user names and passwords can be easily intercepted on the Internet.

NTLM authentication is a challenge-response scheme, consisting of three messages, commonly referred to as Type 1 (negotiation), Type 2 (challenge) and Type 3 (authentication). It basically works like this:

The client sends a Type 1 message to the server. This primarily contains a list of features supported by the client and requested of the server.

The server responds with a Type 2 message. This contains a list of features supported and agreed upon by the server. Most importantly, however, it contains a challenge generated by the server.

The client replies to the challenge with a Type 3 message. This contains several pieces of information about the client, including the domain and username of the client user. It also contains one or more responses to the Type 2 challenge.

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