IMAP access left off
External apps can't connect until POP3/IMAP access is enabled in the mailbox settings.
Warm-up by provider
How to warm up a GMX / WEB.DE inbox
Short answerTo warm up a GMX or WEB.DE mailbox, enable POP3/IMAP access in the mailbox settings, connect over IMAP and SMTP, and ramp slowly from 2-3 to about 30 emails a day. Neither provider publishes fixed sending limits, so steady, low volumes are the safe choice.
Step by step
Connect GMX / WEB.DE to RoxInbox
Connection method: IMAP/SMTP.
- 1
In GMX or WEB.DE settings, turn on POP3/IMAP access for the mailbox.
- 2
In RoxInbox, choose Add mailbox, then GMX / WEB.DE, and enter the address and password.
- 3
RoxInbox confirms access and starts the ramp.
Sending limits 2026
GMX / WEB.DE sending limits
These are mainly consumer mail services. For outreach, GMX and WEB.DE matter most as recipient providers: build reputation with them, and test placement there.
| Limit | Value |
|---|---|
| Daily sending limit | Not published by GMX or WEB.DE as of the date checked |
| External access | POP3/IMAP access must be switched on in the mailbox settings |
Source: GMX Help, checked 14 October 2026.
Ramp plan
A starting ramp for a new domain.
RoxInbox adapts this daily from real spam signals. Use the calculator for a plan for your own domain.
| Week | Emails per day | Note |
|---|---|---|
| Week 1 | 2-5 | Warm-up only |
| Week 2 | 5-12 | Hold steady on any rejection |
| Week 3 | 12-22 | Placement test with GMX and WEB.DE seeds |
| Week 4 | 22-30 | Increase gradually |
Pitfalls
What sends GMX / WEB.DE mail to spam
Overlooking German-speaking recipients
GMX and WEB.DE are widely used in German-speaking countries. A network without them can't build reputation there.
Bursts from a consumer mailbox
Fast, repeated sending from a consumer mailbox looks like spam. Keep volumes personal-scale.
FAQ
GMX / WEB.DE warm-up questions
What is the GMX or WEB.DE sending limit?
Neither publishes a fixed number. Keep volumes low and steady, and slow down if a message is rejected.
Why does email land in spam at GMX or WEB.DE?
They keep their own reputation for your domain. If your warm-up network has no GMX or WEB.DE mailboxes, reputation never builds there. RoxInbox includes both.
Other providers: Outlook / Microsoft 365 · Google Workspace · Yahoo Mail · Zoho Mail · iCloud Mail · Mail.ru · Yandex Mail · Corporate SMTP
Warm up GMX / WEB.DE on autopilot.
RoxInbox connects in five minutes, checks your DNS first, and shows placement at every provider.