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Score: a single number from 0 to 100, based on three weighted signals. Audience quality (40%) — your bounce rate, spam complaint rate, and recipient engagement

raw sending pipe but leaves the dashboard, deliverability, and bounce handling to you. SendGrid is an established API-first platform with a UI, hosted in the

, bounce tracking Reliability: uptime guarantees and a documented SLA Ease of integration: works with any WordPress SMTP plugin without developer help Privacy

. Signs Your List Needs Cleaning High bounce rates (above 2%) Low open or click-through rates over multiple campaigns High unsubscribe or complaint rates Many

and timing improve relevance and conversions. Core KPIs Engagement: open rate, click-through rate (CTR), click-to-open rate (CTO). Deliverability: bounce and

your MX records are wrong or missing, emails sent to your domain may bounce or never arrive. They add reliability: You can publish more than one MX record so email

senders rarely run their own SMTP server; they use a managed relay that handles authentication (SPF, DKIM, DMARC), IP reputation, throttling and bounce

open rate, click-through rate, and deliverability. Continuing to email disengaged users may lead to: Higher bounce rates Increased chances of being marked as spam

prospects' behaviour, resorting to "web tracking" tools is an efficient solution. It enables you to get elaborate data like the turnover by visitor, the bounce

error 451 is a soft bounce: the receiving server is asking to try again later. The two most common... Read more How to Fix Error 530 (Authentication Required