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Sendmail adding local domain to From field

Sendmail adding local domain to From field

Sendmail adding local domain to From field


I have a problem with sendmail leaking information regarding the local domain of the server.

In the sendmail.mc file I have the following line: define(`confDOMAIN_NAME', `www.somedomain')

In the sendmail.cf file I have the following line

# my official domain name
# ... define this only if sendmail cannot automatically determine your domain

Now sometimes what happens are mails are sent out using the following format:
sendmail -i -t -v
From: "Dan" <dan@somedomain.com>
To: joe.bloggs@someotherdomain.com
Subject: test
Some email body.

So when it gets to the recipeint you find that the from address has been translated (assume the local domain on the server is jollyroger.com) to From: "Dan" <dan@somedomain.com.jollyroger.com>, but this does not happen on every mail sent and I think it depends on what server it is sending to.

However I need to stop sendmail from leaking this information.

Does anyone know what the problem could be or is the config file misconfigured?

thanks in advance


RE: Sendmail adding local domain to From field

Can anyone help with this?

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