Dynamic grouping of email recipients

A method, system, and computer usable program product for dynamic grouping of email recipients are provided in the illustrative embodiments. A first recipient and a second recipient of a first email are identified and an association is formed between them. A selection of the first recipient is detected in a second email. Using the association, the second recipient is suggested as a recipient of the second email. The first email may be a previously sent email, and the second email may be an email being composed. A characteristic of the first email is identified and the characteristic may be used as a basis for the association in forming the association. The characteristic may be a phrase in, a type of content in, an attachment in, or a periodicity of the first email. Strength of the association may be modified based on the third email.