Descript uses Braze for marketing email and Postmark for transactional/notifications. They rank #19,758 in the Tranco list of most-popular domains. We've also observed sends via 2 other providers: SendGrid, SparkPost. Email goes out from 3 different subdomains. Their email authentication setup is solid (score 95/100).
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 7 emails we've observed. DMARC policy is read live from DNS.
DMARC reports sent to descript.com. Policy
p=reject means receivers actively block or quarantine spoofed mail.
SPF alignment: all 6 observed emails use a return-path aligned with descript.com (pm-bounces.authmail.descript.com, em626.authmail.descript.com). SPF authenticates the visible From — supports DMARC directly.
DKIM alignment: all 15 observed emails sign with a domain aligned with descript.com (marketing.descript.com, authmail.descript.com). DKIM authenticates the visible From — supports DMARC directly.
TLS: 10% TLS 1.3, 90% TLS 1.2 (across 10 sends).
Delivery: fast — 100% of emails in the last 7 days arrive in under 10 seconds (across 5 sends).
Brands often use multiple ESPs (e.g. one for marketing, another for transactional/notifications).
SendGrid 2 SparkPost 1ESPs 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: descript.com, em626.authmail.descript.com, pm-bounces.authmail.descript.com, marketing.descript.com, mail.descript.com, authmail.descript.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 | 17 | 100.0% |
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 % |
|---|---|---|---|---|---|
| Postmark | 4 | 100.0% | 0.0% | 0.0% | |
| SendGrid | 2 | 100.0% | 0.0% | 0.0% | |
| Braze | 9 | 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 descript.com has been observed sending from, and where their mail landed in Gmail.
| IP | Hostname | Obs | Placement | Reputation |
|---|---|---|---|---|
| 223.165.124.213 | bz1251.marketing.descript.com |
10 | 6 | Check → |
| 50.31.205.74 | mta74-ab1.mtasv.net |
4 | — | Check → |
| 223.165.123.113 | bz1252.mail.descript.com |
1 | — | Check → |
| 168.245.31.111 | o1.ptr1637.stytch.com |
1 | — | Check → |
| 159.183.210.92 | wfbtdnrc.outbound-mail.sendgrid.net |
1 | — | Check → |