It is a spam if the number has 11 digit numbers
If you mean Spam; Basically sending the same message repetitively to all the E-mail addresses you know of
Bayesian spam filters are used to calculate the probability of a message being spam, based on the contents of the message. Bayesian spam filters learn from spam and from good mail, which later results in hardly any spam coming through to a mailbox.
No. Spam is just advertisements and scams. A spam message could contain a virus though.
Depending what e-mail server you use. If there's a way you could look up ALL mail including the spam. There is sometimes a button you can click on that says. Not spam click back to inbox. G-mail and yahoo and some others usually have a way you can get back what you clicked into spam so you can save it without the next mail coming from that person going into the spam box automatically. I only know this because I use G-mail and it has that option.
Spam
The Microsoft Exchange 2003 Anti-Spam blocks unwanted or so-called Spam e-mail messages from one's e-mail inbox. It uses an Exchange Intelligent Message Filter (IMF) to reduce the number or unwanted e-mail messages through to the inbox.
It is alright to receive your email via spam.
It could just be spam mail or viruses
E-mail that is not requested. Also called "junk e-mail," "gray mail," "unsolicited commercial e-mail" (UCE) and "unsolicited bulk e-mail" (UBE), the term is both a noun (the e-mail message) and a verb (to send it). Spam is mostly used to advertise products and sometimes to broadcast political or social commentary. The term was supposedly coined from a Monty Python comedy sketch in the early 1970s, in which every meal in a restaurant contained SPAM (Hormel's processed meat). The sketch came from World War II when SPAM was always available in England while other foods were rationed. Spam may also be an acronym for "sales promotional advertising mail" or "simultaneously posted advertising message."
The Barracuda service has a spam filter which will help sort through a person's mail. This will keep most spam messages out of the inbox and into the spam folder.
Hope you know where the Inbox and compose-mail components are present in your g mail account. The spam mails are located on a folder and the link to it is given in the menu where you see the inbox, compose-mail, etc.,
Its a phone spam scam. Delete it.