Systems and methods for email synchronization may include a computing device with a token bucket. The token bucket allows for temporary storage of tokens, each token authorizing a synchronization of at least one email application running on the computing device. The device may determine a frequency of received email communications associated with an email account managed by the at least one email application and hosted by an email server. The determining may be based on one or more characteristics associated with the token bucket. The determined frequency may be compared with a threshold value. When the determined frequency is equal to or lower than the threshold value, a push communication channel may be established with the email server, the push communication channel for receiving server-initiated email push communications. The at least one email application may be synchronized with the email account by receiving push communications using the push communication channel.