Be sure to only send your photos to agencies that accept your particular type of actor. There is no sense in submitting photos to male acting agencies if you are a female actor and vice versa. You are just wasting your time and the agency’s time. You also run the risk of developing a reputation for being unattentive.
Take the time to address each agency individually in your email or cover letter. For example, begin your letter or email with “Dear ABC Agency.”
Never send out a generic mass email with the email addresses of numerous agencies listed in the “CC” section of the email. No one likes to think they weren’t your first choice and that goes double for agents. It’s also very unprofessional.
Agents like smart actors so, be sure to check every detail such as grammar and spelling, using spell check. If you are mailing photos, how you address the envelope is also important. If you are handwriting the address on the envelope or handwriting your cover letter be sure it is neat and legible. Do not put your photos in a binder, photo album, or folder. Do not use heart stickers, fancy colored paper, or cute messages on envelopes or inside your package.