I've installed sendmail on centos and have configured it for virtual domains. Incoming mail works as it should but outgoing only goes out as the main domain.

I've searched the net for days and have tried countless things but all of them seem to not end up being what I am after. Most of it ends up being outgoing masquerading so that all email goes out one domain.

Can someone please let me know which options I should be looking at or a doc on the net which shows how I can assign a domain name to users so that when they send mail, the email will show their domain only.

Thanks.

You don't mention how users are going to be sending mail from your server, are they making use of a mail client? In which case they should be able to specify the mail address in the client, or are they actually logging in by ssh/telnet to the server to send mail?

I wasn't sure what to mention right off the bat but it's only the server owner who needs to send from multiple domains. Right now, that person is just using webmin/sendmail but might use a mail client later, perhaps with dovecot.

Well on the command line they can use: to set the outbound e-mail address used. If they are going to be doing any volume of mail though they would be much better getting some form of e-mail client sorted and using that instead of webmin/sendmail.

Ok, so the answer is really the sending client then and not something I need to set in sendmail.
Time to get dovecot working I guess.

Thanks very much for your help.

Cool, I didn't even have to install dovecot. I only installed squirrelmail as a local domain, configured it and it's all good now.
Now when I send email out, the reply address does indeed show the proper name/domain to reply to.

However, that didn't change the primary behavior I was hoping to fix which is that the email is still being shown as coming from the main domain when sending. I need it to show as the actual domain which is sending it.

Hi,

I'm sorry it's not directly related to your sendmail, but Postfix address rewriting is doing it (at least I think it does)
maybe sendmail has similar options.

good luck

I don't have postfix installed on this server. Do you mean I need to install this in order to add what is needed?

No, I don't mean to suggest you to install Postfix instead of sendmail, but to search for an option in Sendmail like postfix has (address rewriting)

I don't know how, and I don't have it done, so I can't suggest you, sorry.

Oh I've spent a lot of time trying to find the answer searching and testing but never did. That's why I posted the question.

Thanks for your help.

I am not very sure if I am getting you completely

But have you used this feature of sendmail?
just replace mydomain.com with the domain you want to use and your mails will be received by the client with that domain name

and if this is not what you are looking for then I would like to know in detail for what you want exactly

Receiving is not an issue, it's sending that is.

When sending as a user from a certain domain on the same server, all email contains the headers of the server name itself and not the users domain.

So for example. Say the server's FQDN is mydomain1.com and one of the virtual domains is vdomain1.com.
When a user sends as user@vdomain1.com, the headers show up as follows on the receiving server.

Received: from user@vdomain1.com by (x.x.x.x:25) via mydomain1.com
(x.x.x.x:37089) with [remote.Com SMTP Server] id 1255614756.WH99
for receiver@remote.com; Mon, 6 Feb 2012 11:08:10 -0800
Received: from www.mywebmailgui.net (mydomain1.com [127.0.0.1])

This should fully explain what I am trying to fix