Why your email won’t send
Email systems enforce a total message size limit — attachments plus text plus encoding overhead (attachments grow ~33% in transit due to encoding). Three modern phone photos at 6 MB each can sink a message on their own.
| Provider | Max message size | Photos at 5 MB each | Photos compressed here (~300 KB) |
|---|---|---|---|
| Gmail | 25 MB | ~3 | ~60 |
| Outlook / Microsoft 365 | 20 MB | ~2 | ~48 |
| Yahoo Mail | 25 MB | ~3 | ~60 |
| Corporate servers (common) | 10 MB | 1–2 | ~24 |
Recipients feel the difference too: a 40 MB email is slow to open on mobile, clogs inbox quotas, and often lands in a "too large" bounce loop days later.
The right settings for email photos
Screens cap what recipients can see — a photo wider than ~1600 px adds size, not visible detail, in an email client. This page presets 1600 px max width and quality 80: a typical 5 MB photo becomes 200–400 KB and still looks great full-screen.
iPhone users: HEIC attachments confuse many Windows recipients. Drop them here — they convert to JPG and compress in the same step.
If a recipient's system enforces a hard per-file cap, use the exact-size presets instead: 100 KB, 200 KB or 500 KB.