Blacklisting only a few senders from Gmail's "Forward a copy of incoming mail" feature

Question

I have two Gmail accounts, one trusted and one for "untrusted" websites.

98% of the "untrusted" websites are actually nice, they don't send me any spam, all of the emails they send are actually important (hotel booking notifications, replies to comments, etc). So I have set my untrusted account to forward all emails to my trusted account.

Now how to deal with the 2% of spammers? In my untrusted account, I filtered them to be deleted directly, but even though, they are forwarded to my trusted account :-(

How to prevent these few messages from being forwarded?
Note: I don't want to log into my "untrusted" account more than twice a year.

Answer 1

You can forward all incoming messages via the Forwarding and POP/IMAP settings tab. But you can also forward messages by creating a filter. Unfortunately, there's no way that I know of to order the filters and stop processing the remaining filters if an email matches certain criteria.

I have started using aliases for each website, such as [email protected] and [email protected]. I use these aliases in the To field of the filters to apply the correct labels etc.

If you have the ability to change your email address on the sites of the 'spammers' to something like [email protected], you can create a filter that applies to all emails sent to [email protected] (negative filter) and forward these messages to your trusted account.

Edit:
If you don't have the ability to change your email address, you can create a filter that filters out all emails that don't originate from a spam site. You can use a filter on the From field that looks like [email protected] AND [email protected]. It translates to "all emails that are not from site1.com and also not from site2.com".