Undefined emails
Undefined sends about 2 emails a week through Klaviyo, most often on Tuesday around 6 PM Eastern.
- ESP
- Klaviyo
- Emails a week
- about 2
- Busiest send time
- Tuesdays at 6pm ET
- Last sent
- 13 days ago · Oct 16
- Tracked since
- Mar 2026
- Emails collected
- 72
Recent emails
Oct 16, 2026 2:53 PM
We made it to Friday 🙃
Oct 13, 2026 1:10 AM
Beauty with no BS 💅🏽✨
Oct 9, 2026 10:26 AM
Don’t be shy 🤍
Oct 7, 2026 9:17 PM
[LAST CALL] Better formulas. No BS ⚠️
Oct 7, 2026 10:27 AM
Prime Day Math is Mathing 🤓
Oct 6, 2026 12:39 PM
25% off goes further here ★
![[LAST CALL] Better formulas. No BS ⚠️ - email from Undefined](https://img.theysentit.com/undefined/4303022.t.jpg)
Recent subject lines
All subject linesSubject lines average 27 characters. Each one opens the email it came from.
| Picture | Sent (Eastern) | Subject | Preview text |
|---|---|---|---|
| Oct 16, 2026 2:53 PM | We made it to Friday 🙃 | celebrate with skincare | |
| Oct 13, 2026 1:10 AM | Beauty with no BS 💅🏽✨ | Say hi to skincare that actually gets it. | |
| Oct 9, 2026 10:26 AM | Don’t be shy 🤍 | High-performance. Even better deal | |
| Oct 7, 2026 9:17 PM | [LAST CALL] Better formulas. No BS ⚠️ | 25% off ends TONIGHT | |
| Oct 7, 2026 10:27 AM | Prime Day Math is Mathing 🤓 | High-performance. Even better deal | |
| Oct 6, 2026 12:39 PM | 25% off goes further here ★ | High-performance. Even better deal | |
| Oct 5, 2026 11:25 PM | Cult favorite for a reason ✨ | FREE shipping just for you | |
| Oct 2, 2026 11:24 PM | Pro Science. Pro Inclusivity. 👩🏾🔬 | Anti Fear Mongering. Anti BS |
Archive
View full archiveOctober 2026 10 emails
View allOct 5, 2026 11:25 PM
Pro Science. Pro Inclusivity. 👩🏾🔬
Oct 2, 2026 11:24 PM
Oct 1, 2026 11:23 PM
Oct 1, 2026 7:44 PM
September 2026 5 emails
View allSep 27, 2026 12:20 AM
Pro Science. Pro Inclusivity. 👩🏾🔬
Sep 24, 2026 12:19 AM
Sep 23, 2026 12:18 AM
Your skin’s been waiting for this 🧬
Sep 22, 2026 6:57 PM
Sep 2, 2026 7:45 PM
When Undefined sends
13% of its emails arrive in the 6 PM hour. Tuesdays are the busiest day.
| 12a | 1a | 2a | 3a | 4a | 5a | 6a | 7a | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p | 6p | 7p | 8p | 9p | 10p | 11p | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mon | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 |
| Tue | 0 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 2 | 2 | 0 | 0 | 0 |
| Wed | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 0 | 0 |
| Thu | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 3 | 2 | 3 | 0 | 0 | 1 |
| Fri | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 3 | 0 | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Sat | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| Sun | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 2 | 0 | 3 | 0 | 1 | 0 | 0 | 0 |
| Mon | Tue | Wed | Thu | Fri | Sat | Sun | |
|---|---|---|---|---|---|---|---|
| 12a | 0 | 0 | 1 | 1 | 0 | 0 | 1 |
| 1a | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 2a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3a | 1 | 2 | 0 | 0 | 1 | 0 | 0 |
| 4a | 1 | 1 | 0 | 0 | 1 | 0 | 0 |
| 5a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 6a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 7a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 8a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 9a | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| 10a | 0 | 1 | 1 | 0 | 2 | 2 | 0 |
| 11a | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 12p | 0 | 1 | 0 | 0 | 3 | 2 | 1 |
| 1p | 0 | 1 | 1 | 0 | 0 | 1 | 0 |
| 2p | 2 | 0 | 0 | 1 | 3 | 0 | 1 |
| 3p | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
| 4p | 1 | 0 | 0 | 0 | 1 | 0 | 2 |
| 5p | 0 | 0 | 0 | 1 | 0 | 1 | 0 |
| 6p | 1 | 1 | 0 | 3 | 0 | 1 | 3 |
| 7p | 1 | 2 | 1 | 2 | 0 | 0 | 0 |
| 8p | 1 | 2 | 1 | 3 | 0 | 0 | 1 |
| 9p | 1 | 0 | 2 | 0 | 0 | 0 | 0 |
| 10p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 11p | 1 | 0 | 0 | 1 | 1 | 0 | 0 |
FewerMore(busiest cell: 3 emails)
Based on 72 emails received from Mar 16 to Oct 16, 2026. Times in US Eastern. How we collect · When all brands send
How often Undefined sends
Complete months have run between 4 and 17 emails.
- Busiest month
- Jul 2026, 17
- Quietest month
- Apr 2026, 4
- Busiest day
- Tuesday, 12
- Quietest day
- Wednesday, 7
About Undefined
- ESP
- Klaviyo
- Tracked since
- Mar 2026
- Emails collected
- 72
- Emails a week
- about 2
- Last sent
- Oct 16, 2026
- Sends from
- dorian@
undefinedco.com - Subject length
- 27 characters avg
Counts include automated emails such as a welcome series.
Similar sending frequency
| Latest email | Brand | ESP | Website popularity | Emails a week | Busiest day | Last sent | |
|---|---|---|---|---|---|---|---|
 21Captains21captains.com | Klaviyo | about 2 | Tuesday | Oct 27, 2026 | Klaviyo · about 2 a week · busiest Tuesday · last sent Oct 27, 2026 | ||
 2902929029.co | Klaviyo | about 2 | Wednesday | Oct 29, 2026 | Klaviyo · about 2 a week · busiest Wednesday · last sent Oct 29, 2026 | ||
| 180 Smoke180smoke.ca · Top 1 million sites | Klaviyo | Top 1 million sites | about 2 | Friday | Oct 26, 2026 | Klaviyo · about 2 a week · busiest Friday · last sent Oct 26, 2026 |
