Clickup uses Bloomreach for marketing email and Amazon SES for transactional/notifications. They rank #2,453 in the Tranco list of most-popular domains. We've also observed sends via 2 other providers: Iterable, Mailgun. Email goes out from 4 different subdomains. Their email authentication setup is solid (score 100/100). We've recorded 10 ESP changes since first observing this brand.
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 enforced with p=reject — receivers actively reject or quarantine spoofed mail. No aggregate reporting destination configured.
SPF alignment: 99% of observed emails use an aligned return-path (mail.tasks.clickup.com, bounces.clickup.com, mail.clickup.com); the rest use third-party paths (joinzealot.com, themathergroupllc.com) where DMARC has to rely on DKIM alignment.
DKIM alignment: all 212 observed emails sign with a domain aligned with clickup.com (tasks.clickup.com, mail.clickup.com, clickup.com). DKIM authenticates the visible From — supports DMARC directly.
VMC issued by: digicert.
TLS: modern — 86% TLS 1.3 (across 116 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 15 sends).
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
Iterable 19 Zendesk 4 Mailgun 2ESPs 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: clickup.com, mail.tasks.clickup.com, mail.clickup.com, bounces.clickup.com, themathergroupllc.com, joinzealot.com, tasks.clickup.com, info.clickup.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 | 179 | 96.8% |
| promotions | 6 | 3.2% |
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 | 109 | 100.0% | 0.0% | 0.0% | |
| Bloomreach | 42 | 100.0% | 0.0% | 0.0% | |
| Mailgun | 2 | 100.0% | 0.0% | 0.0% | |
| Zendesk | 4 | 100.0% | 0.0% | 0.0% | |
| Iterable | 19 | 68.4% | 31.6% | 0.0% |
Monthly 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 clickup.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 54.240.120.89 | a120-89.smtp-out.amazonses.com |
85 | 9 | Check → |
| 54.240.120.83 | a120-83.smtp-out.amazonses.com |
72 | 11 | Check → |
| 23.251.229.206 | e229-206.smtp-out.amazonses.com |
59 | 3 | Check → |
| 156.70.72.22 | mta-70-72-22.sparkpostmail.com |
8 | 4 | Check → |
| 192.174.87.207 | mta-174-87-207.sparkpostmail.com |
5 | — | Check → |
| 156.70.72.42 | mta-70-72-42.sparkpostmail.com |
4 | — | Check → |
| 192.161.149.36 | mta-out6.pod23.use1.zdsys.com |
4 | — | Check → |
| 54.240.120.84 | a120-84.smtp-out.amazonses.com |
2 | 1 | Check → |
| 24.110.92.252 | i92-252.smtp-out.amazonses.com |
2 | — | Check → |
| 156.70.72.11 | mta-70-72-11.sparkpostmail.com |
2 | — | Check → |
| 204.220.189.153 | g153.gb3521d9.usw1.send.mailgun.net |
2 | 2 | Check → |
| 54.240.9.110 | a9-110.smtp-out.amazonses.com |
1 | — | Check → |
| Domain | ESPs detected | Delivery (7d) |
|---|---|---|
tasks.clickup.com | Amazon SES 165 Bloomreach 45 | |
mail.clickup.com | Iterable 15 | |
clickup.com | Amazon SES 4 Zendesk 4 Mailgun 2 Bloomreach 1 | |
info.clickup.com | Iterable 4 |