To be absolutely brutal and honest with you, nobody cares about I look forward to hearing from you.. The practical reason is that it's one of the various standard and conventionally polite ways to end the body of the letter. It's just a standard exit.
1 In some cases, liver failure causes this taste to occur. 2  Gastroesophogal reflux disease can cause the salty taste (even when no pain is present). 3  Some medicines can make everything taste odd. for example the drug enalapril, which is a drug used to prevent heart failure.
Blood: Blood has a salty taste and there are many reasons that you might have blood in your mouth including a bitten tongue or damaged gums. Even healthy gums sometimes bleed and this can then cause you to get a salty and also 'metallic' taste in your mouth.