Put email in queue and send it one by one, by limits.
More Plugins
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Page Specific Menu Items
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PublishPress Revisions: Duplicate Posts, Submit, Approve and Schedule Content Changes
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Under Construction, Coming Soon & Maintenance Mode
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Bulk remove posts from category
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Accordions – Responsive Accordion & FAQ Plugin for WordPress
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Functionality
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Timeline Module for Beaver Builder
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Interlinks Manager – Internal Links Optimizer
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Democracy Poll
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License Manager for WooCommerce
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Retrigger Notifications Gravity Forms
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Automatic Expiration for Categories
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SEO SIMPLE PACK
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PressForward
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Move Comments
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RSS Aggregator by Feedzy – Feed to Post, Autoblogging, News & YouTube Video Feeds Aggregator
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Pages In Widgets
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Custom Query Blocks
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Additional Variation Images Gallery for WooCommerce
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Inline Image Upload for BBPress