Dropbox uses Iterable for marketing email and Amazon SES for transactional/notifications. They rank #138 in the Tranco list of most-popular domains. Email goes out from 3 different subdomains. Their email authentication setup is solid (score 100/100).
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 Validity (EmailAnalyst). Policy
p=reject means receivers actively block or quarantine spoofed mail.
SPF alignment: all 52 observed emails use a return-path aligned with dropbox.com (email.dropbox.com, mail.em-s.dropbox.com, mail.txn.dropbox.com). SPF authenticates the visible From — supports DMARC directly.
DKIM alignment: all 44 observed emails sign with a domain aligned with dropbox.com (dropbox.com, em-s.dropbox.com, txn.dropbox.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: modern — 94% TLS 1.3 (across 32 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 7 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: dropbox.com, mail.em-s.dropbox.com, mail.txn.dropbox.com, email.dropbox.com, em-s.dropbox.com, txn.dropbox.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 | 53 | 100.0% |
Placement observed in Outlook / Microsoft 365 mailboxes. Focused Inbox splits mail into two tabs, "Focused" (inbox) and "Other", plus Junk. 0% reached the Focused inbox across 1 observed email.
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 % |
|---|---|---|---|---|---|
| Iterable | 52 | 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 dropbox.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 76.223.141.65 | c141-65.smtp-out.amazonses.com |
4 | 3 | Check → |
| 54.240.39.217 | a39-217.smtp-out.amazonses.com |
4 | — | Check → |
| 54.240.60.103 | a60-103.smtp-out.us-west-2.amazonses.com |
3 | — | Check → |
| 54.240.39.214 | a39-214.smtp-out.amazonses.com |
3 | — | Check → |
| 54.240.60.143 | a60-143.smtp-out.us-west-2.amazonses.com |
2 | — | Check → |
| 54.240.60.166 | a60-166.smtp-out.us-west-2.amazonses.com |
2 | — | Check → |
| 54.240.60.164 | a60-164.smtp-out.us-west-2.amazonses.com |
2 | — | Check → |
| 54.240.60.155 | a60-155.smtp-out.us-west-2.amazonses.com |
2 | — | Check → |
| 54.240.60.161 | a60-161.smtp-out.us-west-2.amazonses.com |
2 | — | Check → |
| 54.240.40.182 | a40-182.smtp-out.amazonses.com |
2 | 2 | Check → |
| 54.240.40.175 | a40-175.smtp-out.amazonses.com |
2 | 2 | Check → |
| 54.240.60.133 | a60-133.smtp-out.us-west-2.amazonses.com |
2 | 2 | Check → |
| 76.223.141.81 | unknown |
1 | — | Check → |
| 54.240.39.208 | unknown |
1 | — | Check → |
| 54.240.60.157 | unknown |
1 | — | Check → |
| 54.240.60.98 | a60-98.smtp-out.us-west-2.amazonses.com |
1 | — | Check → |
| 76.223.145.145 | c145-145.smtp-out.us-west-2.amazonses.com |
1 | — | Check → |
| 54.240.39.206 | a39-206.smtp-out.amazonses.com |
1 | — | Check → |
| 54.240.40.170 | a40-170.smtp-out.amazonses.com |
1 | — | Check → |
| 76.223.141.78 | c141-78.smtp-out.amazonses.com |
1 | — | Check → |
| 54.240.60.134 | unknown |
1 | — | Check → |
| 76.223.145.137 | c145-137.smtp-out.us-west-2.amazonses.com |
1 | — | Check → |
| 76.223.145.144 | c145-144.smtp-out.us-west-2.amazonses.com |
1 | — | Check → |
| 76.223.145.122 | c145-122.smtp-out.us-west-2.amazonses.com |
1 | — | Check → |
| 54.240.60.162 | a60-162.smtp-out.us-west-2.amazonses.com |
1 | — | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
dropbox.com | Iterable 35 Amazon SES 1 | |
em-s.dropbox.com | Iterable 14 | |
txn.dropbox.com | Iterable 5 |
