Saastrinc uses Marketo as their primary email service provider. Their email authentication setup is good (score 70/100). Missing: DMARC enforcement.
Non-ESP tools detected in this brand's emails. Independent of who sends — a brand can use any combination.
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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 6 emails we've observed. DMARC policy is read live from DNS.
No DMARC record published. Domain is not protected against spoofing.
SPF alignment: observed emails use a third-party return-path (potomac1050.mktomail.com) — SPF passes there but doesn't align with saastrinc.com, so DMARC has to rely on DKIM alignment.
DKIM alignment: all 20 observed emails sign with a domain aligned with saastrinc.com (saastrinc.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: 0% TLS 1.3, 100% TLS 1.2 (across 9 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 4 sends).
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: saastrinc.com, potomac1050.mktomail.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 | 26 | 96.3% |
| spam | 1 | 3.7% |
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 % |
|---|---|---|---|---|---|
| Marketo | 24 | 95.8% | 0.0% | 4.2% |
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 saastrinc.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 192.28.152.140 | potomac2140.mktomail.com |
9 | 3 | Check → |
| 192.28.152.139 | potomac2139.mktomail.com |
4 | — | Check → |
| 192.28.152.141 | potomac2141.mktomail.com |
3 | — | Check → |
| 192.28.150.229 | potomac1229.mktomail.com |
2 | 1 | Check → |
| 199.15.213.51 | potomac1051.mktomail.com |
2 | 1 | Check → |
| 192.28.150.227 | potomac1227.mktomail.com |
2 | — | Check → |
| 199.15.213.50 | potomac1050.mktomail.com |
2 | — | Check → |
| 192.28.150.228 | potomac1228.mktomail.com |
1 | — | Check → |
| 192.28.150.226 | potomac1226.mktomail.com |
1 | — | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
saastrinc.com | Marketo 27 |