Two technologies are used in conjunction: DKIM (Domain Keys Identified Mail) and SPF (Sender Permitted From).
Look for sunglasses with an eye-sun protection factor (E-SPF) between 25 and 50, he said.
Plan on packing a full-sized bottle of SPF 30 to keep your skin safe this weekend.
Dr. Spencer recommends that people look for water-resistant, broad-spectrum products with an SPF of at least 30.
Holdings, Inc. ( NYSE: MDC) is trading flat, and Standard Pacific Corp. ( NYSE: SPF) is relatively unchanged.
Dermatologists recommend wearing a broad-spectrum sunscreen with at least SPF 15 every day.
The problem arises because the SPF system only works out if e-mail comes from its claimed place of origin.
It found that 34% more spam is passing SPF checks than legitimate e-mail.
Ms. Lunder noted that in Europe the standards are more rigid: UVA protection has to be one-third of the SPF.
The protocols for that kind of authentication, known as DomainKeys Identified Mail (DKIM) and Sender Policy Framework (SPF) are hardly new.
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But a survey carried out by mail filtering firm CipherTrust has shown that spammers are the most enthusiastic users of the SPF technology.
One summer beauty myth debunked: Just because your tinted moisturizer or foundation boasts an SPF does not mean you're scot-free to hit the beach.
Products that don't protect against both types of rays or that have an SPF between 2 and 14 can claim only to help prevent sunburn.
But, said Mr Judge, the SPF technology is proving its worth when spotting e-mails from so-called phishers who try to pass themselves off as legitimate organisations.
Sunscreen products that pass a new FDA test will now say "broad spectrum, " followed by the product's SPF, to indicate its effectiveness for both types of rays.
"If they were not comfortable handing evidence in their possession to the Singapore Police Force (SPF), they could seek the FBI's help to review the evidence, " a spokesman said.
Mark Harris, chief executive of mortgage broker SPF Private Clients, explained that most mortgages track a lender's standard variable rate, or the base rate, so most are not directly affected by Libor.
One is the housing market as job growth has long been a key driver and that bodes well for shares of Toll Brothers (TOL), The Ryland Group (RYL), Standard Pacific (SPF), D.
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In the run up to the game, the Scottish Police Federation (SPF) - the police officers union - called for a ban on Old Firm games in Glasgow, saying they led to too much violence.
Among the largest underlying components of XHB, in trading today USG Corp ( NYSE: USG) is off about 0.3%, Standard Pacific Corp. ( NYSE: SPF) is off about 2%, and Ryland Group, Inc. ( NYSE: RYL) is lower by about 0.2%.
Among the largest underlying components of XHB, in trading today Mohawk Industries, Inc. ( NYSE: MHK) is up about 1%, Tempur-Pedic International Inc ( NYSE: TPX) is up about 1%, and Standard Pacific Corp. ( NYSE: SPF) is higher by about 1.5%.
Among the largest underlying components of XHB, in trading today Tempur-Pedic International Inc ( NYSE: TPX) is off about 0.6%, Mohawk Industries, Inc. ( NYSE: MHK) is off about 1.3%, and Standard Pacific Corp. ( NYSE: SPF) is lower by about 3.5%.
Spending 88 days exposed to the sun might have seemed an odd way to raise awareness for melanoma, but Ridley, a redhead who admits he burns easily, stocked up on SPF 50 sunblock and UV protective clothing, and took breaks when the sun was the strongest.
But a product's SPF indicates only its ability to defend against sunburn-causing ultraviolet-B rays and not against ultraviolet-A, which penetrate deeper into the skin and cause premature aging. (Both types contribute to skin cancer.) For example, a person wearing SPF 50 could spend considerable time in the sun without getting burned.
Speaking on the Business Scotland programme on BBC Radio Scotland, Mr Naish - who is also a head of real estate at Scottish Widows Investment Partnership in Edinburgh - stressed that the SPF was not against or for independence, but that political and economic uncertainty increases investment risk, and that equates to cost.
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