Can incoming emails be filtered & ignored?
It is possible to define individual inbox import conditions which can automatically filter out certain e-mails. You can define, for example, a condition to only accept e-mails which have the word 'XYZ' in the subject line.
This setting can be found in the Inbox Settings tab, under Email Reception:
You can then add multiple conditions if you like.
Emails will show up in your inbox only if all the conditions match.