The server response was: SPAM Content Found (VM603) xW8mlG4eCkn1KxW8mlmhcn
That seems to be becoming quite a common issue. Strangely the Virgin Media outgoing spam filters appear to be much stricter that the filters on incoming emails.
Only the VM email security team will know the reason why those emails have been blocked.
Personally, I think it is unlikely that your emails are being blocked as spam simply because the word "Kisharon" appears in the email.
I note that you say that you can send from "a browser" by which I assume you mean the VM Webmail service, whereas the same emails get blocked when you send from Apple Mail. When you send from your iOS device is that via your VM wifi or using mobile data?
Most spam filters work on variations of a points system with the decision on the legitimacy or otherwise of an email being based on a number of factors. Possibly an email sent from your VM Webmail account via your VM network might be be considered less "risky" than the same email sent from a third party email app via a mobile network. (An email sent via a customer's VM network is most likely being sent by the customer, whereas one sent from a mobile network could have been sent by a hacker who has gained access to your email address and password and is using them to send spam remotely. I am not saying that is what is happening just that is a possible explanation.)
You may well find that this block will disappear in a day or so but the Forum Team (VM employees) can get this looked at by the VM security team. They will pick up on your post in the next few days and contact you via this thread.
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