Mail id's uploding issue and email id add issue

@mauticdeveloper @mauticset @mauticuser1245 @Mauticator @mautic_test @mautic_evolok @Mautist

I am uploading 40000 mail id in matic which is not uploading completely out of this only 25000 is getting uploaded why is this happening can someone help me please and can someone tell me that mail address
How many sender mail ids can I add in to send mail from?

Hi, plz check this in the Mautic Knowledge base: