What did you change to make the sender appear as adrian.house? Is there an account with that user name, or is it an identity defined for the k79... account? If a mail server receives a message with the user name not matching the account sending name, it might be rejected as spam.

You might avoid that by entering your name, Adrian House, in the Your Name field in Tools/Account Settings for the k79... account (select the account in the left pane, change Your Name in the right pane).

Hi, thanks for the reply. I'm going to try to figure that out, and will let you know when I do.

So I looked on mun.ca and adrian.house@mun.ca is set as my "preferred email address" for the university's webmail.

The way I have Thunderbird configured is as adrianhouse.mun.ca, and Adrian House is there for "your name". Should I change it to k79adh, and then put the mun.ca address in the reply-to address maybe?

thanks again

Actually I just tried that and sent a test email to another account - it seems to work, doesn't go to spam, but my sending address appears as k79adh. Only displays adrian.house@mun.ca when I compose a reply.

I think you should avoid any use of adrian...@mun.ca since it's not an actual email address. If your official address is k79...@mun.ca, that is what must be entered in the User Name field for both the incoming and outgoing servers. Enter Adrian House in the Your Name field, not adrian...@mun.ca. A recipient will see that your message was sent from Adrian House or k79...@mun.ca, or both, depending on how they set up their email program. For example, in TB you can adjust 'Show only display name...' in Tools/Options/Advanced. Other email programs may have similar settings.