Thanks Adriaan and Graeme!
So I think we have established that the username is in the body of the text.
Perhaps a more useful screen would be for the name of the thread, which appears in the subject line of the email as well as the body of the text.
I have Microsoft Outlook as my email program, and in looking at the options it appears that no additional add-on or other spam program is needed.
In Outlook, right click on the mail message you wish to filter.
Click on Create Rule.
If you wish to filter out messages from a particular thread, then click Subject Contains. The name of the email subject is already shown, but can be modified if desired.
Then click Move The Item To Folder and click on Select Folder to chose your Junk folder or other destination.
Click on Ok. You'll be asked if you want to go ahead and run the filter on all messages in the current folder (presumably your inbox); if you click yes, it will then move all messages with the name of the particular thread to your junk folder. And your done.
If you want to filter a particular username, that can be done too.
Again, right click on the message, and click Create Rule.
Click Move The Item To Folder and click on Select Folder to chose your Junk folder or other destination.
In the bottom right of the window, click Advanced Options.
Click on With Specific Words In The Body.
In the bottom of the window where it says Step 2, click on the underlined Specific Words.
Where is says specify a word or phrase, type in the username, and then click Add, and then Ok.
Now click Finish.
To run this rule now, click Tools, then Rules And Alerts, then Run Rules Now, then choose the rule and click Run Now. Here you can also edit your rules.
If you don't have Outlook, your program may have similar rule making options. If it doesn't, there may be add-ons for your program that do, or you may be able to find spam software that will do the job.
