Upwork uses Braze for marketing email and Mailgun for transactional/notifications. They rank #1,998 in the Tranco list of most-popular domains. Email goes out from 4 different subdomains. Their email authentication setup is solid (score 100/100). We've recorded 11 ESP changes since first observing this brand.
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 10 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to vali.email. Policy
p=reject means receivers actively block or quarantine spoofed mail.
SPF alignment: 73% of observed emails use an aligned return-path (mg.upwork.com, e.email.upwork.com, e.t.upwork.com); the rest use third-party paths (dignitas.fund) where DMARC has to rely on DKIM alignment.
DKIM alignment: all 76 observed emails sign with a domain aligned with upwork.com (mg.upwork.com, email.upwork.com, t.upwork.com). DKIM authenticates the visible From — supports DMARC directly.
VMC issued by: valimail.
TLS: 44% TLS 1.3, 56% TLS 1.2 (across 39 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 13 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: upwork.com, dignitas.fund, e.email.upwork.com, e.t.upwork.com, mg.upwork.com, email.upwork.com, t.upwork.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 | 90 | 98.9% |
| promotions | 1 | 1.1% |
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 % |
|---|---|---|---|---|---|
| Braze | 31 | 100.0% | 0.0% | 0.0% | |
| Mailgun | 48 | 97.9% | 2.1% | 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 upwork.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 149.72.115.111 | o3804.e.email.upwork.com |
24 | 3 | Check → |
| 161.38.199.160 | v5160.v5d8cfca0.usw1.send.mailgun.net |
14 | 2 | Check → |
| 149.72.115.113 | o3805.e.t.upwork.com |
10 | 3 | Check → |
| 69.72.32.66 | v566.v54767b5a.usw1.send.mailgun.net |
7 | 2 | Check → |
| 204.220.187.118 | v5118.v52b64c0e.usw1.send.mailgun.net |
6 | — | Check → |
| 198.244.56.67 | c67.c5341538.usw1.send.mailgun.net |
5 | 3 | Check → |
| 204.220.187.151 | v5151.v52b64c0e.usw1.send.mailgun.net |
5 | — | Check → |
| 159.112.254.142 | v5142.v530814cf.use4.send.mailgun.net |
4 | — | Check → |
| 198.244.56.66 | c66.c5341538.usw1.send.mailgun.net |
3 | — | Check → |
| 192.237.158.54 | mail1.static.mg.upwork.com |
1 | 1 | Check → |