No 10 says there are anti-spam measures and people who want to sign a petition have to give an e-mail address and a UK address including postcode, or an overseas address.
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You need a professional e-mail address, a LinkedIn profile, even a Twitter and Facebook account to help troll for possible contacts and opportunities.
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These days using a Yahoo e-mail address carries all the cultural cachet of carrying a Zune, signaling membership in the bridge-and-tunnel crowd of the tech world.
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The safest alternative payment service, according to Forzley, is Secure-ebill, where a customer provides only a name and e-mail address to the merchant, which in turn sends a bill electronically.
In this connection, it was noted that at least one Caribbean prime minister used a publicly available e-mail address to receive comments and suggestions from citizens and these ideas were later incorporated in a weekly radio address to the nation.
Symantec said users should always limit contact information posted to job websites and to use a disposable e-mail address.
Like many people, my buddy Lindy has a work e-mail address and uses Microsoft Outlook to read and store e-mails.
There's still one weak link in the equation: What if you're using a different e-mail address in five, ten or 20 years?
When it reaches a new victim, the virus searches for addresses to despatch itself to and also picks a random e-mail address for the 'from' line to cover its tracks.
That's three-quarters as many people as Salesforce has using its software, though there's one big difference: Anyone with a corporate e-mail address can sign up for Yammer, free, and connect with others in the same company.
In July Twitter briefly suspended the account of a journalist who had published the e-mail address of a manager at NBC while criticising it for lacklustre coverage of the London Olympics.
"The only piece of information you see is the information you already know - that might be a Facebook name, a Twitter id or e-mail address, " says Jonathan Grubin, head of Send Social.
Mobile users can also be duped through so-called "smishing" -- a combination of the words SMS and phishing -- where a user receives a text message asking for personal information like a credit card number, e-mail address or social security number.
Google will then ask for verification details for the listed people, like a phone number and e-mail address.
And the State Department has set up a phone number and e-mail address that you can find at www.state.gov -- www.state.gov -- to inquire about your loved ones.
When he found it, he quickly hacked into its corporate servers, sent a note to its CEO's unlisted e-mail address (both announcing the security breach and asking for a job) and then moved to New York to become its lead programmer.
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Other IM programs don't require that--users of AOL Instant Messenger, for instance, might have a totally different IM name than their e-mail address, or might not even have an AOL account at all.
After that time period of inactivity, Google will send out a text message and e-mail the secondary address you provide.
Clicking that image, which Apple titled "hero, " leads to a page with a company statement and an e-mail address for sending condolences.
The Seattle, Washington-based company is asking developers to submit an e-mail address to be notified when a "limited beta" of the Kindle Development Kit starts next month.
Posterous was founded a year after Tumblr and introduced several innovations that were quickly copied by Tumblr, such as the ability to update your blog by sending an e-mail message to a special address.
But if your e-mail address stumps it, there is no way to enter a server name or IP address manually.
After confirming your e-mail address you get a link to download the back-up software.
Never attempt to communicate with a hiring manager through their personal e-mail, home address, cell phone or telephone.
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Amazon also removed an e-mail address included in a reader's review, which let Web surfers contact the reviewer directly.
OpenTable asks each user to enter an e-mail address to become a member.
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The website includes an e-mail address along with a PGP public key.
Entrepreneurs simply choose a username and password, enter an e-mail address and zip code, and sync the site to their QuickBooks software.
Attorney Tim Herman, in a recent e-mail to CNN Sports, did not address whether Armstrong told associates -- as reported by the newspaper -- that he was considering an admission.
It also has an e-mail alert feature designed to send a snapshot of what the camera is seeing as an attachment to any e-mail address.
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