Uptimerobot uses Sendy for marketing email and SendGrid for transactional/notifications. They rank #5,858 in the Tranco list of most-popular domains. We've also observed sends via Amazon SES. Email goes out from 2 different subdomains. Their email authentication setup is good (score 80/100).
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 2 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to cloudflare.net. Policy
p=quarantine means receivers actively block or quarantine spoofed mail.
SPF alignment: all 7 observed emails use a return-path aligned with uptimerobot.com (mail.ses.uptimerobot.com, sgrreturn.uptimerobot.com, mailses.uptimerobot.com). SPF authenticates the visible From — supports DMARC directly.
DKIM alignment: all 7 observed emails sign with a domain aligned with uptimerobot.com (ses.uptimerobot.com, uptimerobot.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: modern — 100% TLS 1.3 (across 6 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 2 sends).
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
Amazon SES 1ESPs 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: uptimerobot.com, mailses.uptimerobot.com, mail.ses.uptimerobot.com, sgrreturn.uptimerobot.com, ses.uptimerobot.com, sgr.uptimerobot.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 | 5 | 71.4% |
| promotions | 2 | 28.6% |
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 % |
|---|---|---|---|---|---|
| Sendy | 4 | 50.0% | 50.0% | 0.0% | |
| Amazon SES | 1 | 100.0% | 0.0% | 0.0% | |
| SendGrid | 2 | 100.0% | 0.0% | 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 uptimerobot.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 159.183.170.65 | o1.sgr.uptimerobot.com |
2 | — | Check → |
| 69.169.224.58 | b224-58.smtp-out.eu-central-1.amazonses.com |
2 | 2 | Check → |
| 54.240.9.110 | a9-110.smtp-out.amazonses.com |
1 | — | Check → |
| 69.169.224.59 | b224-59.smtp-out.eu-central-1.amazonses.com |
1 | — | Check → |
| 69.169.224.50 | b224-50.smtp-out.eu-central-1.amazonses.com |
1 | — | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
ses.uptimerobot.com | Sendy 4 | |
uptimerobot.com | SendGrid 2 Amazon SES 1 |
