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Sharepoint Web Part 550 5.7.1 Client does not have permissions to send as this sender

We (actually our DBA) are setting up a sharepoint server. One of the web parts she is trying to use is trying to send an email but gets the error above.

When i ran a wireshark capture on the sharepoint server, i see that the web part is using auth ntlm. I don't think it should need to since its not sending externally, only internally. Also, I'm not sure who it's authenticating as.

i found online to run this command: Add-AdPermission -Identity "Default Receive Connector" -User "NT AUTHORITY\Authenticated Users" -ExtendedRights ms-Exch-SMTP-Accept-Any-Sender

However, if i do that I'm not sure what consequences it will have. does this open up a security hole?
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msidnam
Asked:
msidnam
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1 Solution
 
Rainer JeschorCommented:
Hi,
what web part is this? Which SharePoint version and edition?
SharePoint has built-in possibilities to send emails using the configured email server.
The SharePoint web app normally executes with the current logged on user therefore the built-in tools are sending through the app pool user and NOT the logged in user. It seems that the web part is doing it the "wrong" way.
I am no Exchange Pro but the above does really NOT look nice - to enable all authenticated user to send emails from any machine. I personally would not configure exchange this way.
HTH
Rainer
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msidnamAuthor Commented:
I will need to check with my DBA, but it's from http://artfulbits.com/. I'm not sure exactly which product.

We have foundation 2013. the web part is to allow users to purchase items from the company store. when they add something to the cart and checkout, the web part emails them.

I agree, i do not think they are doing it correctly. We've reached out to them to see if they can possibly remove the auth ntlm from the web part and just connect to the email server, do the MAIL FROM, RCPT TO, DATA, SUBJECT and then email body.
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Rainer JeschorCommented:
Hi,
I just analyzed their code - it looks OK - they try to send the email using the SharePoint provided context.
Therefore another question:
do you already verified that emails are sent from SharePoint in general?
There are two different "locations/tools" sending emails:
- the web app itself (e.g. when registering for an alert)
- the Windows SharePoint Timer Service (when sending alerts)

Again, as I am no Exchange pro, please double check with your Exchange admins the following configurations:

http://sharepoint-for-real.blogspot.de/2013/07/sharepoint-2013-incoming-and-outgoing-e.html
and
http://sharepointgeorge.com/2010/configuring-outgoing-email-sharepoint-2010/

HTH
Rainer
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msidnamAuthor Commented:
I can verify that we can send emails from sharepoint itself. It seems to be something with this shopping cart web part. I am no sure about the Windows Sharepoint Timer Service.

I'm also the exchange admin so i'll take a look at the links as well.

Thank you.
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msidnamAuthor Commented:
We found out that we needed to change the SMTP service settings inside the sharepoint server.
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