Text Messages from my other e-mail address taking ages to arrive, then going into spam

[Davos63]

Has anyone got any idea why emails I forward from my hotmail and/or gmail e-mail to my SKY e-mail have recently stopped arriving in my Inbox at all, or take many minutes to arrive and then go into the Spam folder.  Those other addressess are saved as contacts. 

It's never happened before. 

Messages sent from my SKY  e-mail to the other addresses arrive instantly. 

I've checked on the Settings and there are no filters set.

Thanks. 

[caesarome]

It might be worth reading through this:

https://www.sky.com/help/articles/emails-automatically-being-sent-to-trash

[Davos63]

Thanks for the help, but it wasn't the answer I was hoping for.  I'd already referred to the suggested FAQ section. It wasn't any help at all.

For example one test message I sent to my other e-mail  account (hotmail) took about 4 1/2 hours to arrive back to my SKY e-mail when I replied to it, and then went into the Spam Folder, even though that address is listed and previously marked Not Spam.