99.8% Email Delivery Rate — How Visisto Keeps You Out of Spam

Visisto is the complete website growth system that maintains a 99.8% email delivery rate across all plans. Most email service providers don't publish their delivery rate — because it's not impressive. This article explains exactly how Visisto keeps your emails out of spam: the authentication protocols, the infrastructure decisions, and the practices you need to follow.

Why deliverability matters more than features

An email that lands in spam is worse than an email never sent. It damages your sender reputation, trains ISP filters against you, and erodes trust with the recipients who do find it in their junk folder. Here's the real cost:

• 95% delivery rate: 500 emails lost per 10,000 sent. At £0.84 revenue per email, that's £420 lost per campaign.
• 98% delivery rate: 200 emails lost per 10,000 sent. £168 lost per campaign.
• 99.8% delivery rate (Visisto): 20 emails lost per 10,000 sent. £16.80 lost per campaign.

Over a year of weekly broadcasts, the difference between 95% and 99.8% delivery is £21,008 in revenue. That's why we obsess over deliverability before features.

The three authentication protocols you need

Since February 2024, Gmail and Yahoo require bulk senders (5,000+ emails/day) to authenticate with DKIM, SPF, and DMARC. Without all three, your emails go to spam. Period.

DKIM (DomainKeys Identified Mail)

DKIM adds a cryptographic signature to your emails proving they were sent by an authorised server. Think of it as a wax seal on a letter. Visisto generates your DKIM key automatically during setup — you add one DNS record and you're authenticated.

SPF (Sender Policy Framework)

SPF tells receiving servers which IP addresses are allowed to send email on behalf of your domain. Without SPF, anyone can spoof your domain. Visisto provides the exact SPF record to add — one TXT record in your DNS.

DMARC (Domain-based Message Authentication, Reporting, and Conformance)

DMARC builds on DKIM and SPF by telling ISPs what to do when authentication fails: none (report only), quarantine (send to spam), or reject (block entirely). Start with "none" to monitor, then move to "quarantine" after 30 days of clean reports.

IP warm-up: the patience tax

New sending domains and IPs have no reputation. ISPs treat unknown senders as suspicious. The solution is warm-up: gradually increasing send volume over 2–4 weeks to build trust.

• Week 1: 50–200 emails/day to your most engaged contacts (opened in last 30 days)
• Week 2: 500–1,000 emails/day, expanding to 60-day engaged
• Week 3: 2,000–5,000 emails/day, expanding to full active list
• Week 4: Full volume — all active subscribers

Visisto automates this entire schedule. When you connect a new domain, the system throttles your sends automatically and gradually increases volume. No manual pacing required.

List hygiene: the silent reputation killer

Sending to invalid, inactive, or spam-trap addresses destroys your sender reputation. Visisto handles this automatically:

• Hard bounce suppression: Automatically suppressed after first bounce. Never sent to again.
• Soft bounce retry: Retried 3 times over 72 hours, then suppressed.
• Complaint handling: Contacts who mark you as spam are instantly suppressed.
• Inactive suppression: Contacts with no opens/clicks in 180 days are flagged for re-engagement or removal.
• Spam trap detection: Known spam trap patterns are filtered during import.

Our delivery rate on Mailchimp was 93%. We weren't doing anything wrong — their shared IP had a bad reputation from other senders. Moved to Visisto, delivery went to 99.6% in the first month.

Infrastructure decisions that protect your reputation

• Dedicated IP pools: Your sends don't share IPs with spammy senders. Shared IP platforms (Mailchimp, Sendinblue) can tank your delivery because of other users' behaviour.
• Smart throttling: Send rate adapts in real time based on ISP feedback signals. If Gmail starts deferring, Visisto slows down automatically.
• Feedback loop integration: Visisto processes ISP feedback loops (FBLs) from Gmail, Yahoo, Outlook, and AOL. Complaints are handled within minutes, not hours.
• TLS encryption: All emails sent over TLS. Required by most ISPs, ignored by many budget ESPs.
• Reputation monitoring: Real-time sender score tracking visible in your dashboard. Get alerts before issues become problems.

The 5 things killing your deliverability right now

1. Missing DMARC record: 61% of domains sending bulk email still don't have DMARC. Gmail now filters these more aggressively.
2. Purchased or scraped lists: Spam trap hit rate on purchased lists averages 5–8%. One campaign to a purchased list can blacklist your domain for months.
3. No warm-up: Sending 10,000 emails on day one with a new domain. ISPs flag this as spam immediately.
4. Ignoring bounces: Continuing to send to hard-bounced addresses. Each bounce worsens your reputation.
5. Shared IP platform: Your neighbour's spam campaigns affect your inbox placement. You have no control.

The bottom line

Email deliverability isn't sexy, but it's the foundation everything else depends on. The best subject line, the most compelling offer, and the most beautiful template are worthless if they land in spam.

Visisto maintains a 99.8% delivery rate through automatic DKIM configuration, automated IP warm-up, real-time bounce handling, dedicated IP pools, and smart throttling. We publish this number because we're confident in it. Ask your current ESP for theirs — if they won't share it, that's your answer.