Inconsistent PM email notifications

[Flopsy]

I'm averaging about 4 PMs a day on average at the moment and I usually rely on the email notifications sent to my email account to tell me when I receive them since I don't check the forums very often. It is also really helpful to read the PM in the email notification too.

Lately however, sometimes I get the email notification and sometimes I don't. And sometimes I have logged onto the forums to find nearly 5 PMs I wasn't emailed about.
I realise this is probably a problem with the forums host provider and it's probably not going to get resolved easily but I'm just posting to see if this is happening to other people who receive email notifications on forum Private Messages?

[namida]

Just to rule some things out first:
- Did you check your Spam folder?
- Did you check the inbox of the email address your forum account is registered with, or does that forward to another email which you check? If the latter, are the emails there if you log into the email associated with your forum account?

Assuming that doesn't answer anything, some questions that might help me start in the right direction / track down the issue:
- Were these multiple PMs in a row from the same user, or from different users?
- At the time you received the PM for which the notification didn't arrive, did you have unread PMs? (I realise the wording of the option is "Always", but I'm wondering if SMF has some not-clearly-documented rule as to when it will or won't send one.)
- Can you provide the times of some PMs - specifically, a PM you did not receive a notification for, and the closest ones both before and after it that you did receive one for?

I'll likely have to do some testing / source-code-examining to figure this out. A quick check with both the forum error logs, and SendGrid bounce logs (SendGrid is the service used for sending emails from the site), don't reveal anything that sheds light on what's happening here.

[Flopsy]

Turns out the forums are innocent, it was my email client sending the missing messages to my spam folder. I found it bizarre that some messages got sent there but not others. Oh well

[namida]

SendGrid is often used for newsletters etc, so if you've been marking these as Spam, that might explain it. At any rate, if you mark a few LF ones as Not Spam, GMail should quickly learn that you don't consider them spam.