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.
1 Limited to or more pronounced on one side salty taste may be due to a disorder of the parotid gland, the problem of the teeth, ear infection, paralysis, Bell trigeminal neuralgia, herpes zoster (rash on the same side).  Dry mouth can be dehydration, medication side effects, SjÃ¶grenâs syndrome.