Dreams of the alphabet symbolize that you are spelling out your feelings and thoughts in a desire to be understood. Your dream may be telling you that if you keep communication simple, it is more apt to be understood. See Word.... Strangest Dream Explanations
Individual letters usually stand for something, such as a person: for example, the letter “g” or the sound of a “g” may stand for “george,” or some other signiﬁcant person or object in a person’s life. ... New American Dream Dictionary
If you dream of receiving a letter that is delivered by hand, it is an indication that you have done something which is not considered upright by your lover, A letter written with white ink on a dark paper is an unlucky portent. It indicates separation between husband and wife or between lovers, and it may be accompanied by unwholesome allegations.
A warning that you should beware of unworthy concerns is contained in a dream of trying to hide a letter from your sweetheart, wife, or husband.
A registered letter is a portent of family troubles and selfishness on the part of one or the other of two lovers. Jealousy of a rival is indicated by a registered letter.
A happy letter of an affectionate nature is a pleasant augury; but if it is written on colored paper, it indicates that there will be difficulties in love or in business. Written in blue ink on white paper is a sign that you will be lucky in love and in money matters.
A maiden who dreams of receiving a letter from her lover and placing it close to her heart will have cause to be worried by a beautiful rival.... The Complete Dream Book
To dream that you receive a Letter, is a sign of unexpected news; but if you post or send a Letter, then you will meet some unexpected difficulty that will upset your plans, but may not cause any real loss. Letters are a sign of something unexpected.... Mystic Dream Book