Email Reputation is a measure of a sender?s trustworthiness based on factors like email deliverability, bounce rates, spam complaints, and engagement levels. A high email reputation increases the chances of emails reaching recipients? inboxes rather than being filtered as spam. Factors affecting email reputation include email authentication protocols (SPF, DKIM, DMARC), sending frequency, and content quality. Businesses use email monitoring tools like SendGrid and GlockApps to assess and improve their email reputation. Maintaining a positive reputation ensures higher open rates, better customer engagement, and more effective email marketing campaigns.