GMX Mail SMTP Settings
Free German mailbox from 1&1 Mail & Media, with separate .net and .com server names
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Outgoing mail (SMTP)
SMTP server
mail.gmx.com
Port. STARTTLS
587
Port. SSL/TLS
465
Security
SSL/TLS on 465 (recommended) or STARTTLS on 587.
Incoming mail (IMAP)
IMAP server
imap.gmx.com
Port. SSL/TLS
993
Port. STARTTLS
143
Incoming mail (POP3)
POP3 server
pop.gmx.com
Port. SSL/TLS
995
Port. STARTTLS
110
Sending limits & login
Daily send limit
Varies by account age and status.
Authentication
Turn on POP3/IMAP access under Settings before connecting: it is disabled by default.
App password
GMX uses your normal password once POP3/IMAP is enabled; no separate app password is required.
German accounts often use mail.gmx.net / imap.gmx.net / pop.gmx.net instead.
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GMX Mail SMTP, IMAP and POP3 settings
GMX is a free German mailbox run by 1&1 Mail & Media, the same company behind WEB.DE and mail.com. Outside programs cannot reach it until you switch POP3 and IMAP on yourself, and GMX turns that switch back off on its own if you stop using the client for a long stretch. German accounts use imap.gmx.net, while the English-language service uses imap.gmx.com.
For incoming mail, use the IMAP server imap.gmx.com on port 993, or POP3 at pop.gmx.com on port 995. Pick the exact values from the tool above and copy them straight into your mail client.
Checked against GMX Mail's own documentation: hilfe.gmx.net, support.gmx.com. Ports and limits change, so check there too if something will not connect.
GMX Mail settings at a glance
One card with every server and port on it. Right click to save it, or share the page and this is the preview people see.
What to enter as your GMX Mail username and password
Wrong credentials, not a wrong port, are the usual reason a GMX Mail connection fails. These are the exact values to type.
Your full GMX address, for example name@gmx.de or name@gmx.net
Your application-specific password, or the normal mailbox password if you have not created one
Get your anwendungsspezifisches passwort (application-specific password)How to set up GMX Mail in a mail client
The exact path through GMX Mail's own settings, in order.
- 1
Switch on POP3 and IMAP in the mailbox
Log in at www.gmx.net, click the icon with your initials in the top menu bar, open E-Mail-Einstellungen, choose POP3/IMAP under E-Mail empfangen and move the slider to 'POP3- und IMAP-Zugriff erlauben'. On the English service the path is Email, Settings, POP3 & IMAP, 'Enable access to this account via POP3 and IMAP'.
- 2
Create an application-specific password
Log in on the GMX website, click the icon with your initials and choose Account verwalten (this opens account.gmx.net). Click Login & Sicherheit on the left, scroll down to Anwendungsspezifische Passwörter verwalten, then Neues Anwendungsspezifisches Passwort erstellen. On the English service the path is the profile icon, Security Options, Manage application-specific passwords. GMX shows the password once only, so copy it before closing the dialog.
- 3
Enter the incoming server
IMAP is imap.gmx.net on port 993 with SSL, or POP3 is pop.gmx.net on port 995 with SSL. Port 143 works for IMAP only if you turn STARTTLS on, because it is unencrypted by default.
- 4
Enter the outgoing server
SMTP is mail.gmx.net on port 587 with STARTTLS, or port 465 with SSL. Tick the option that the outgoing server requires authentication.
- 5
Sign in with the full GMX address
The username is the complete address, for example name@gmx.de. Use the application-specific password if you created one, otherwise the mailbox password.
What GMX Mail looks like filled in
Every mail client asks for the same handful of fields. Here they are with GMX Mail's values already in place.
Account settings: GMX Mail
Server
mail.gmx.comPort
465Encryption
SSL/TLSAuthentication
RequiredUsername
Your full GMX address, for example name@gmx.de or name@gmx.netPassword
Your application-specific password, or the normal mailbox password if you have not created oneServer
imap.gmx.comPort
993Encryption
SSL/TLSAn illustration of the fields, not a screenshot of any one app. Field names differ slightly between Outlook, Apple Mail and Thunderbird; the values do not.
GMX Mail SMTP settings in Thunderbird
The outgoing server dialog with GMX Mail's details entered. Outlook and Apple Mail ask for the same four things under slightly different names.
Which port should you use for GMX Mail?
SSL/TLS on 465 (recommended) or STARTTLS on 587.
STARTTLS
Starts as a plain connection, then upgrades to an encrypted one. The modern standard for sending.
SSL/TLS
Encrypted from the first byte. Widely supported and a good choice when 587 is blocked.
Plain SMTP
Meant for server-to-server relay. Home networks and cloud hosts block it, so do not use it to send from a client.
Why your GMX Mail connection is failing
The failures people actually hit with GMX Mail, and what fixes each one.
GMX checks the From address before it relays and only accepts addresses that belong to the mailbox: the primary address, a Zweitadresse or a GMX FunDomain. Change the sender address in the client, or send through the other provider's own SMTP server.
GMX switches POP3/IMAP off again by itself when a program has gone unused for a longer period. Log in at gmx.net and set 'POP3- und IMAP-Zugriff erlauben' back on; the client settings do not need changing.
With 2FA on, GMX blocks the normal mailbox password for external programs. Create an application-specific password from Account verwalten, Login & Sicherheit, re-activate POP3/IMAP if it was turned off, and log the client in again with the new password.
GMX allows POP3/IMAP from all countries outside Europe, the USA and Canada only when you authenticate with an application-specific password. Create one before you leave and store it in the client.
GMX dropped TLS 1.0 and 1.1. The client has to negotiate TLS 1.2 or 1.3, so update the program or move to a current one.
GMX Mail sending limits
GMX publishes attachment sizes per tariff but publishes no daily, hourly or per-message recipient figure anywhere in its own help centre.
Max attachment
20 MB on FreeMail, 50 MB on ProMail, 100 MB on TopMail
GMX Mail servers by region and plan
GMX Mail does not use one set of hostnames everywhere. Match the row to your account.
| Region or plan | SMTP | IMAP | POP3 |
|---|---|---|---|
| German-language GMX (hilfe.gmx.net) | mail.gmx.net | imap.gmx.net | pop.gmx.net |
| English-language GMX (support.gmx.com) | mail.gmx.com | imap.gmx.com | pop.gmx.com |
Sending cold email through GMX Mail
Varies by account age and status. Turn on POP3/IMAP access under Settings before connecting: it is disabled by default.
Those caps make single-mailbox sending fine for personal mail but a poor fit for cold outreach at volume. Emailchaser spreads sending across warmed inboxes and manages deliverability, so you can scale without burning GMX Mail accounts.
Other consumer email providers
Setting up more than one mailbox? These sit in the same category as GMX Mail.
Common questions about GMX Mail SMTP settings
What are GMX Mail's SMTP settings?
GMX Mail's outgoing (SMTP) server is mail.gmx.com. Use port 587 (STARTTLS) or 465 (SSL/TLS). SSL/TLS on 465 (recommended) or STARTTLS on 587. Sign in with your full email address and password (or app password).
What is GMX Mail's IMAP or POP3 server?
GMX Mail's incoming IMAP server is imap.gmx.com on port 993 (SSL/TLS). If you prefer POP3, use pop.gmx.com on port 995.
Which port should I use for GMX Mail?
Use port 587 with STARTTLS wherever it's offered, it's the modern standard for authenticated sending. Port 465 with SSL/TLS is a solid alternative. Avoid port 25, which most networks block for client sending. GMX Mail's recommended value is above.
Why won't my GMX Mail SMTP connection work?
Check authentication first: Turn on POP3/IMAP access under Settings before connecting: it is disabled by default. GMX uses your normal password once POP3/IMAP is enabled; no separate app password is required. Then confirm the host, port and security method match exactly, a 587/SSL or 465/STARTTLS mismatch will fail to connect.
Can I send bulk or cold email through GMX Mail?
Not at scale. Varies by account age and status. Providers throttle bursts to fight spam, so pushing cold email through one mailbox hits limits and wrecks deliverability. High-volume outreach belongs on dedicated infrastructure that spreads sending across warmed inboxes, which is what Emailchaser does.
Why do some GMX guides say imap.gmx.net and others say imap.gmx.com?
GMX runs two help centres, a German one at hilfe.gmx.net and an English one at support.gmx.com, and each documents its own hostnames. Use the .net names if you signed up through the German site and the .com names if you signed up through the English one. If one set is refused at connect time, try the other before assuming the password is wrong.
Do I need to pay for ProMail before I can use IMAP?
No. GMX documents the same IMAP, POP3 and SMTP servers for FreeMail as for the paid tariffs, and the on/off switch sits in the free mailbox settings. What ProMail and TopMail change is the attachment ceiling, from 20 MB up to 50 MB or 100 MB.
Can I put my work address in the From field and send through GMX?
No. GMX verifies that the sender address genuinely belongs to your mailbox and answers 'Unauthorized sender address' when it does not. Only your primary GMX address, your secondary addresses and your GMX FunDomains pass that check. To send as an address at another provider, use that provider's outgoing server.
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