Not Receiving Emails Since A Week Ago Please

Not Receiving Emails Since A Week Ago Please

I'm having similar issue as another strings here. I initially posted this in one of those strings, however acknowledged it was very nearly seven days old and checked settled. So ideally this is taken care of here faster since this issue has been on going for more than a week ago with no purpose.
I'm not getting any messages forward to my zoho mail since the previous morning.. According to a red box at the top, "The Server couldn't be associated. Check whether the Server is accessible to interface in the given name and port number."
In one more string it was prescribed to check MX records? So that's what i'm doing, however at that point I had a few additional considerations..
..it occurred to me.
a) my primary email which I was initially referring to is sent from gmail (my email@domainname.com messages go there first prior to being sent for simply such an event as this..).. what's more, they are appearing in gmail. Intriguing..
b) I have one more email account set up in zoho mail that likewise gets messages sent from gmail. I recently checked and.. drum roll... I haven't had any messages in there since early yesterday.
'b' is huge in light of the fact that it's anything but a @domainname.com ...it's simply a gmail email address.
Some other thoughts please?
Much obliged