Hi Kathy,

I'm confused. There seems to be evidence of both a sending and a receving problem.

For a possible sending problem: Would you please go to account settings (≡ button at top right) > account settings, then click on Outgoing server (SMTP) in the left pane? In the right pane, are there any servers from mchsi.com? Or only gmail servers?

Somehow the pc thinks that just that one gmail account is run through or attached to mchsi.com.

There's a couple ways to interpret your intention here. You don't want any gmail accounts being run through or attached to mchsi.com, right?

Sorry, it is confusing. I'm not able to receive emails on Thunderbird or on Google for the one gmail account that seems to be run through or attached to mchsi.com. I can send emails on Thunderbird from that old gmail account and from my phone, just can't receive. I did check the settings you suggested and they all say gmail. No settings with mchsi. Thank you for any help you can offer.

I can make no sense of this situation.

You seem to be saying that all messages (right?) sent to one of your gmail addresses bounce with an error message that cites a mchsi.com address. That means that Google's server is bouncing the messages, they never reach Thunderbird, and so Thunderbird is not even relevant. Is that right?

Do you have that gmail account set to forward messages to your old mchsi.com account, which no longer exists?

Would you please post a screen image of the bounce message?

Here is the screen image.

Do you have that gmail account set to forward messages to your old mchsi.com account, which no longer exists?

Where would I check that? I wouldn't have known how to do that intentionally.

If I understand the situation correctly, every message sent to your old gmail address causes the Google mail server to report that it cannot deliver the message to your mchsi.com address. The only explanation that I can think of is that Google is trying to forward mail.

Google's instructions for turning automatic fowarding off:

1. Open Gmail.
2. Sign in to the account that's forwarding your emails.
3. In the top right, click Settings See all settings.
4. Click the Forwarding and POP/IMAP or Forwarding tab.
5. In the "Forwarding" section, click Disable forwarding.
6. At the bottom, click Save Changes.

Was forwarding set?

There was no forwarding set. I really appreciate you trying to help. Any other ideas? My mchsi account was closed 2 years ago and I was still receiving gmails to the old account up until I deleted the mchsi emails and folders from my pc 6 months ago. That is when I stopped receiving gmails to that account. Even before that though people were complaining about their emails to that account bouncing back sometimes although I did receive them.

Are you certain that you checked the right gmail account?

I'm still pondering.

Maybe someone else will try to help.