1.Iamwritingtoexpressmydeepestgratitudefor...
2.ItiswithgreatpleasurethatIwritethisletterto...
3.IamwritingtobringtoyourattentionsomeconcernsIhaveregarding...
4.Iwouldliketoexpressmysincereapologyfor...
5.Allowmetointroducemyself/myorganization...
6.Iamwritingtoinquireabout...
7.Iwouldappreciateitifyoucould...
8.Ilookforwardtohearingfromyousoon.