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syssolutFlag for United States of America

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Is there any way to mask the e-mail server my e-mails are coming from

I have someone who works for a company, and will say their e-mail is John@123.com.   They need to use Outlook.  Their ISP is Hughes.net.   The e-mail they are sending out since their company doesn't have a setting for sending e-mail is  John@gmail.com.  

Right now in Outlook e-mails can be received to John@123.com via "123.com" in the POP3 receive setting.   E-mail can be sent from John@gmail.com via "smtp.gmail.com" in the POP3 sending setting.   The issue is that the e-mail people are receiving from their sent mail are being seen as from John@gmail.com.   We have seen it from others in the company where they are sending over smtp.charter.net but the e-mails when received say whoever@123.com.   We would like to set the John account up so even though he is sending from gmail, that the person receiving sees it from John@123.com.  Any ideas how to do this?
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Dr. Klahn

It would be better to have the company bring up a legitimate email server so that employees can route outgoing mail through it.  Spoofing email addresses is a bad idea, because many MTAs check to confirm that the sending IP matches the sender's claimed domain - and if it doesn't, it'll be refused out of hand.
Most email client programs allow you to select which account you are sending from.
about the best you can get is email from john@gmail on behalf of john@company.com
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Rindi.  Where does Outlook allow this?   I know you can choose the account that you are sending from but will it mask the e-mail it is sending from?  Again, sending from John@gmail.com, can it be showing that it is from John at 123.com?   I know there is one person at this company that has charter.net and they send through mail.charter.net, but it shows Harry@123.com.
their smtp address is  smtp.charter.net ?  If so I'm really surprised that it wasn't blocked as in this scenario charter is operating as an open-relay and any header inspection would block it as potentially spoofed.

What you want is not a function of outlook but the email server you connect to.
I don't use m$ Outlook. I prefer better, OpenSource, free software. The best Mail Client is Thunderbird. There you can select which account you want to use to send the mail from. In  m$ Outlook that is probably also possible. In thunderbird you do that when you write a new message, you can do that in the "From" field. The Dropdown box allows you to select which account you want to use to send the message from.

Of course you have to have setup that account in the client.
You could just create multiple profiles in Outlook.... while more work to switch between them, at least you're assured all of the settings are correct AND email addresses will show the way that they should.
But if John@123.com has pop settings only and no smtp settings, then it doesn't matter what account I choose.   The person that this does work for that has mail.comcast.com as smtp and theirs outgoing e-mails show as XXXXX@123,com didn't set theirs up so they don't know how it is working, but somehow it is maskedto show correctly.
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masnrock
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Hi.  I was able to set up the masking in g-mail.  Under settings it allowed me to set a different e-mail address than the g-mail account.  So in other words even though the smtp server is smtp.gmail.com, it allowed me to set up the account so it showed as John@123.com.   Thanks for the suggestions.