Gmail Forwarding and filtering on the destination account

Question

1. I have a main gmail account where I forward emails from my other side-gmail accounts.

2. Let's say my main email is: [e-mail], and my side email is: [e-mail].

3. Now, I have set up forwarding on [e-mail] to forward all emails to [e-mail].

4. I have created a filter to: [e-mail] on [e-mail] so that I can check all the emails from my main emails.

5. I use gmail's dots don't matter feature and register on websites as [e-mail] (notice the lack of the dot) or [e-mail] and all these emails land in [e-mail] just fine.

Now the issue:

• when these emails arrive to the [e-mail] account after being forwarded from [e-mail] as they should, there is no way for me to write a filter that encompasses all the combinations in which [e-mail] could be written by switching the dots around. I would like to find out how I can make it so that any email sent to [e-mail] or its "dot-switched" versions lands in one single filter on [e-mail]

Answer 1

Try the following (untested suggestion):
Forward to plussed version version of your gmail address and filter based on deliveredto.

1. [e-mail] forwards to [e-mail]
2. [e-mail] uses deliveredto:[e-mail] in filtering

WARNING: email to both addresses may produce unwanted results.