Sender reputation is best described as:

• A. The brand's social standing
• B. The trust ISPs assign to your sending IP/domain based on past behavior
• C. The number of subscribers you have
• D. The rate at which you forward emails

Answer: (B)

Sender reputation is the trust ISPs place in your sending IP and domain based on how you’ve behaved in the past. This trust gates deliverability: a strong reputation makes it more likely your messages reach the inbox, while a weak one increases the chance they’re filtered to spam or blocked. The reputation builds from concrete signals like bounce rates, spam complaints, and how recipients engage with your emails (opens, clicks, replies), plus how consistently you send and whether you’ve properly authenticated your mail (SPF, DKIM, DMARC). It isn’t about how popular your brand appears on social media, nor simply how many subscribers you have, nor how quickly emails are forwarded. Those elements don’t directly determine the sender trust ISPs rely on.