You mentioned replicating messages from another device! Did you mean if you have two cells on one account, one of them could have the other's messages duplicated to their cell to see what is being texted from the other cell on the account??
When I said 'replicating', I was referring to Verizon's Integrated Messaging where you can have multiple devices (tablet, phone, desktop) logged into the same phone number profile login. The Integrated Messaging, replicates the messages to all devices logged in to the same profile login.
Report it as spam by forwarding it to 7726 (which spells SPAM on the dialer).
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.
I just did a test text from my email account to 'firstname.lastname@example.org and it hit my phone from 6245. 6245 on the keypad spells MAIL. Someone/something is sending the text from an email client to your number at vtext.com. When using Android Auto to read the text to me, it has the originating email address that sent the text in the header.
When I looked at the Message Info in Integrated Message+ on my desktop it shows the sending email address.