Cornell uses Salesforce MC as their primary email service provider. They rank #582 in the Tranco list of most-popular domains. We've also observed sends via 2 other providers: HubSpot, Mailchimp. Email goes out from 3 different subdomains. Their email authentication setup is solid (score 85/100).
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 8 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to cornell.edu. Policy
p=reject means receivers actively block or quarantine spoofed mail.
SPF alignment: 41% of observed emails use an aligned return-path (bounce.bird.cornell.edu, bounce.m.cornell.edu); the rest use third-party paths (cornellemails.allaboutbirds.org, mandrillapp.com) where DMARC has to rely on DKIM alignment.
DKIM alignment: all 17 observed emails sign with a domain aligned with cornell.edu (birds.cornell.edu, bird.cornell.edu, m.cornell.edu). DKIM authenticates the visible From — supports DMARC directly.
TLS: 62% TLS 1.3, 38% TLS 1.2 (across 13 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).
HubSpot 5 Mailchimp 4ESPs 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: cornell.edu, mandrillapp.com, cornellemails.allaboutbirds.org, bounce.m.cornell.edu, bounce.bird.cornell.edu, birds.cornell.edu, m.cornell.edu, bird.cornell.edu
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 | 14 | 93.3% |
| spam | 1 | 6.7% |
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 2 observed emails.
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 % |
|---|---|---|---|---|---|
| Mailchimp | 4 | 75.0% | 0.0% | 25.0% | |
| Salesforce MC | 5 | 100.0% | 0.0% | 0.0% | |
| HubSpot | 5 | 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 cornell.edu has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 54.174.59.133 | pgg3iv.cornellemails.allaboutbirds.org |
4 | 2 | Check → |
| 136.147.238.240 | mta2.bird.cornell.edu |
3 | 3 | Check → |
| 198.2.135.66 | mail21.mcsignup.com |
2 | — | Check → |
| 13.110.232.145 | unknown |
2 | — | Check → |
| 198.2.135.65 | mail20.mcsignup.com |
2 | 2 | Check → |
| 158.247.29.81 | bid48tf.cornellemails.allaboutbirds.org |
1 | — | Check → |
| 158.247.19.210 | bid46xw.cornellemails.allaboutbirds.org |
1 | — | Check → |
| 136.147.237.177 | mta.bird.cornell.edu |
1 | — | Check → |
| 136.147.239.192 | mta4.bird.cornell.edu |
1 | 1 | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
birds.cornell.edu | HubSpot 5 Mailchimp 4 | |
bird.cornell.edu | Salesforce MC 5 | |
m.cornell.edu | Salesforce MC 2 |