Trello uses Amazon SES as their primary email service provider. They rank #1,194 in the Tranco list of most-popular domains. Their email authentication setup is solid (score 85/100). Missing: one-click unsubscribe.
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 proofpoint.com. Policy
p=reject means receivers actively block or quarantine spoofed mail.
SPF alignment: all 835 observed emails use a return-path aligned with trello.com (atlassian-bounces.trello.com). SPF authenticates the visible From — supports DMARC directly.
DKIM alignment: all 705 observed emails sign with a domain aligned with trello.com (trello.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: modern — 100% TLS 1.3 (across 349 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 55 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: trello.com, atlassian-bounces.trello.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 | 381 | 97.7% |
| promotions | 9 | 2.3% |
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 | 306 | 97.4% | 2.6% | 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 trello.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 76.223.147.240 | c147-240.smtp-out.us-west-2.amazonses.com |
144 | 10 | Check → |
| 76.223.147.225 | c147-225.smtp-out.us-west-2.amazonses.com |
132 | 7 | Check → |
| 76.223.147.243 | c147-243.smtp-out.us-west-2.amazonses.com |
112 | 5 | Check → |
| 76.223.147.234 | c147-234.smtp-out.us-west-2.amazonses.com |
109 | 6 | Check → |
| 216.221.175.236 | g175-236.smtp-out.amazonses.com |
108 | 6 | Check → |
| 216.221.175.202 | g175-202.smtp-out.amazonses.com |
97 | 6 | Check → |
| 216.221.175.148 | g175-148.smtp-out.amazonses.com |
96 | 4 | Check → |
| 216.221.175.177 | g175-177.smtp-out.amazonses.com |
95 | 13 | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
trello.com | Amazon SES 799 |
