Questions (Tickets) email notifications NOT working

[#1]

When a PlusNet agent updates a Question (Ticket), the last line of the update to the ticket says:
Exxxxd Exxxxxxz[Notification sent to: username@gmail.com]
.... but emails are not being sent or received.

[#2]

I'm going to test this on a few accounts and let you know what happens, we've not had any other reports of problems with this.
Adam

[#3]

Have you checked in your gmail spam folder?

[#4]

It will probably be in there mine is in my gmail spam folder, I'll get this raised. Now you mention it Jelv this has come up before I'm sure....

[#5]

Perhaps a guide to creating a gmail filter?

[#6]

Cheers jelv, good work.

[#7]

If it were a Gmail problem then surely I would still see the copy sent to my PlusNet Postmaster account. Yes? 

[#8]

I've not checked if the PN mail servers are dkim signed or not, or pass any SPF checks, but having those records in place will reduce the likelihood of mail being caught as spam.

[#9]

As far as I'm aware the system only sends it to your contact e-mail address. I've tested this with several e-mail addresses and it seems to send to them all just fine.

[#10]

Adam, All my notifications are indeed in my Gmail Spam folder. I think that PlusNet need to correct the issue of WHY Gmail is categorising PlusNet Support mail as Spam by default.
Jelv, Thank you for correctly diagnosing and suggesting the workaround to this problem.
R

[#11]

Wheel_nut,
As mentioned is happened before so I'll post back here as soon as I've got some more information.
Adam