Hello. I've started using EasySocial groups and have some high membership levels. 200+ group members. This is generating a lot of system emails to the members (for example "XYZ joined the group"

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The members have opted IN to these emails and want them... but the volume got my server marked as spam and shut down yesterday. Talking with the technical support they are saying the batch size of the emails should be limited to help address the issues....
Can you tell me how many emails in the mail queue EasySocial sends at a time. I assume the frequency comes from the CronJob settings. Also is there a way to change that batch size? Thank you!