Amazonaws uses Amazon SES as their primary email service provider. They rank #9 in the Tranco list of most-popular domains. Email goes out from 4 different subdomains. Their email authentication setup is good (score 72/100).
Amazon SESAuthentication 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 10 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to 
p=quarantine means receivers actively block or quarantine spoofed mail.
SPF alignment: 1% of observed emails use an aligned return-path (mail-authentication.tax-and-invoicing.us-east-1.amazonaws.com); the rest use third-party paths (amazonses.com, at-s.com, eu-central-1.amazonses.com) where DMARC has to rely on DKIM alignment.
DKIM alignment: 99% of observed emails sign with an aligned DKIM key (sns.amazonaws.com, costalerts.amazonaws.com, amazonaws.com); the rest sign with third-party keys (amazonses.com) where DMARC has to rely on SPF alignment.
TLS: modern — 100% TLS 1.3 (across 71 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 24 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: amazonaws.com, amazonses.com, eu-central-1.amazonses.com, at-s.com, mlist.sbs-infosys.co.jp, mail-authentication.tax-and-invoicing.us-east-1.amazonaws.com, sns.amazonaws.com, costalerts.amazonaws.com, tax-and-invoicing.us-east-1.amazonaws.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 | 134 | 100.0% |
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 % |
|---|---|---|---|---|---|
| Amazon SES | 125 | 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 amazonaws.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 54.240.10.237 | a10-237.smtp-out.amazonses.com |
4 | 1 | Check → |
| 54.240.10.23 | a10-23.smtp-out.amazonses.com |
4 | — | Check → |
| 54.240.48.205 | a48-205.smtp-out.amazonses.com |
4 | 3 | Check → |
| 54.240.31.38 | a31-38.smtp-out.amazonses.com |
3 | — | Check → |
| 54.240.31.37 | a31-37.smtp-out.amazonses.com |
3 | — | Check → |
| 54.240.10.100 | a10-100.smtp-out.amazonses.com |
3 | — | Check → |
| 54.240.37.33 | a37-33.smtp-out.amazonses.com |
3 | — | Check → |
| 54.240.10.6 | a10-6.smtp-out.amazonses.com |
3 | 3 | Check → |
| 69.169.224.52 | b224-52.smtp-out.eu-central-1.amazonses.com |
2 | — | Check → |
| 54.240.33.202 | a33-202.smtp-out.amazonses.com |
2 | — | Check → |
| 54.240.10.210 | a10-210.smtp-out.amazonses.com |
2 | 1 | Check → |
| 54.240.48.237 | a48-237.smtp-out.amazonses.com |
2 | — | Check → |
| 54.240.8.82 | a8-82.smtp-out.amazonses.com |
2 | 1 | Check → |
| 54.240.32.114 | a32-114.smtp-out.amazonses.com |
2 | — | Check → |
| 54.240.10.240 | a10-240.smtp-out.amazonses.com |
2 | — | Check → |
| 54.240.48.13 | a48-13.smtp-out.amazonses.com |
2 | — | Check → |
| 54.240.48.229 | a48-229.smtp-out.amazonses.com |
2 | — | Check → |
| 54.240.36.194 | a36-194.smtp-out.amazonses.com |
2 | — | Check → |
| 54.240.48.135 | a48-135.smtp-out.amazonses.com |
2 | — | Check → |
| 54.240.30.211 | a30-211.smtp-out.amazonses.com |
2 | — | Check → |
| 54.240.10.221 | a10-221.smtp-out.amazonses.com |
2 | — | Check → |
| 54.240.48.53 | a48-53.smtp-out.amazonses.com |
2 | 2 | Check → |
| 54.240.32.85 | a32-85.smtp-out.amazonses.com |
2 | 2 | Check → |
| 54.240.33.96 | a33-96.smtp-out.amazonses.com |
2 | 2 | Check → |
| 54.240.10.217 | a10-217.smtp-out.amazonses.com |
2 | 2 | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
sns.amazonaws.com | Amazon SES 127 | |
costalerts.amazonaws.com | Amazon SES 9 | |
amazonaws.com | Amazon SES 8 | |
tax-and-invoicing.us-east-1.amazonaws.com | Amazon SES 1 |
