Zacks uses Salesforce MC for marketing email and SendGrid for transactional/notifications. They rank #18,942 in the Tranco list of most-popular domains. Email goes out from 2 different subdomains. Their email authentication setup is solid (score 95/100).
Authentication signals observed in this brand's emails. SPF, DKIM and DMARC are the standard sender-authentication stack — see the DMARC policy below for whether spoofing is actually blocked or just monitored. One-click unsubscribe meets Google & Yahoo's bulk-sender requirements.
SPF / DKIM / DMARC above reflect the last 4 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to inboxmonster.com. Policy
p=quarantine means receivers actively block or quarantine spoofed mail.
SPF alignment: all 19 observed emails use a return-path aligned with zacks.com (bounce.email.zacks.com, em4183.zacks.com). SPF authenticates the visible From — supports DMARC directly.
DKIM alignment: all 18 observed emails sign with a domain aligned with zacks.com (email.zacks.com, zacks.com). DKIM authenticates the visible From — supports DMARC directly.
VMC issued by: digicert.
TLS: modern — 100% TLS 1.3 (across 10 sends).
1 of 2 emails in the last 7 days were delayed beyond 5 minutes (50%) — delays stayed within 5–15 minutes. Slow sends averaged 7 min 46 sec. Healthy senders deliver in under 30 seconds. Consistent delays usually mean greylisting, reputation-based throttling, or receiver-side filter scrutiny — worth investigating sender reputation and authentication setup.
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
None — only the primary ESP(s) shown aboveESPs we've seen sending email for this brand. Green = confirmed by SPF, sender IP rDNS, or known infra pairing (label shows the source). Grey = observed but not yet confirmed by SPF or PTR.
ESPs this brand has authorized in their SPF record. We confirm them with a green ✓ only after seeing recurring use (3+ emails across 2+ days). Until then they stay here — either we haven't observed any email yet, or we've seen a handful but not enough to call them a regular sender for the brand.
Probed: zacks.com, bounce.email.zacks.com, em4183.zacks.com, email.zacks.com, grid1.zacks.com
Folder distribution across all emails from this brand observed in Gmail inboxes. High inbox % = good deliverability; spam appearances are the headline signal.
| Folder | Count | Share |
|---|---|---|
| inbox | 8 | 50.0% |
| promotions | 8 | 50.0% |
Which ESP's emails are landing where. Sorted by spam % so problem senders surface first. Brands using one ESP for marketing and another for transactional often see very different placement profiles per ESP. Per-ESP folder data only started being captured recently — counts here may be smaller than the total above until backfill catches up.
| ESP | Emails | Placement | Inbox % | Tabs % | Spam % |
|---|---|---|---|---|---|
| Salesforce MC | 12 | 66.7% | 33.3% | 0.0% | |
| SendGrid | 4 | 0.0% | 100.0% | 0.0% |
Daily observations per ESP. Brands often run multiple ESPs concurrently — marketing on one, transactional on another — so this chart shows usage rather than switches.
IP addresses zacks.com has been observed sending from, and where their mail landed in Gmail.
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
email.zacks.com | Salesforce MC 15 | 🐢 1/2 slow (avg 5 min 36 sec, peak 7 min 46 sec) |
zacks.com | SendGrid 4 |