I mean in the communities landing controller

There is any way to do the redirection in the community instead old site VF page since we will get retired the VF page in the future?

@JitenderPadda Yes

so i should clean the list from null and empty string using a if statement or remove (' ') and remove (Null) because I have tried remove () and I got this error System.NullPointerException: Attempt to de-reference a null object

Now after doing some change in the code i got this error : INVALID_EMAIL_ADDRESS, Email address is invalid: : [toAddresses, ]

it is retrun |USER_DEBUG|[15]|DEBUG|primaryEmail([email protected], )

the list of emails is not null

after fixing the query i got this error : INVALID_TYPE_FOR_OPERATION: entity type CombinedAttachment does not support query.