Have you checked in your the spam folder of your Virginmedia account?
If emails sent from Gmail are not arriving at all, are you seeing any error or non delivery messages in your Gmail account?
Firstly I use Ritlabs The Bat! email client from which I use NTL, Virgin, GMX and Gmail accounts.
Secondly: I'm hopeless!
I pretty sure for the NTL email address if anything arrives which NTL thinks it is Spam it will prefix the message header <SPAM>
I'm pretty sure that doesn't happen for the Virginmedia account.
I don't get a non delivery messages in GMail.
As a matter of interest, today I'm able to send from GMail to Virginmedia. It seems to be corrected.
I've noticed you are VERY HELPFUL....... Today I managed to login/create a Virginmedia account on my android phone with the app and by logging into my account using the PC. I prefer the PC because of my failing eyesight. Although I created the account with Virginmedia the primary account is NTL. I had NO difficulties.
Years ago when things were easier, I created sub email accounts with separate email addresses and passwords, IIRC I created them through the primary account?
Would you please be able to advise me how I access these sub accounts to check if there are any SPAM mails or be able to set those accounts to enter <SPAM> at the beginning of message which it thinks are suspect.
TIA