SMTP relay hosted in Germany.
Your email gets delivered.

MailBridge handles outgoing email from your devices and applications: scanners, ERP, CRM, online stores, transactional email and newsletters. One SMTP configuration and everything just works. Reliable, GDPR-compliant, with real people behind the support.

Try it free for 14 days How it works

No credit card required
Servers in Germany
Cancel monthly
LOGIN SystemHaus, since 1991

220 relay.mailbridge.email ESMTP ready EHLO erp.yourcompany.com 250-STARTTLS · 250 AUTH LOGIN PLAIN AUTH LOGIN •••••••••• 235 2.7.0 Authentication successful MAIL FROM:<billing@yourcompany.com> 250 2.1.0 OK RCPT TO:<accounts@customer.com> 250 2.1.5 OK DATA … invoice-2026-0713.pdf 250 2.0.0 OK: accepted and delivered Delivered · Inbox

Status 5xx Delivery failed

Sound familiar?

535 5.7.139 Authentication unsuccessful, basic authentication is disabled
Your scanner needs to email a document. Microsoft 365 refuses the login. What is behind it
530 5.7.57 Client was not authenticated to send anonymous mail
Your ERP or accounting software has stopped sending invoices. Basic auth has been switched off.
X-Spam-Flag: YES · delivered to: Junk Email
Your quotes end up in the customer's spam folder. Or never arrive at all.
554 5.7.1 Service unavailable; client host blocked using blacklist
Your server IP is on a blacklist. Delisting takes days, and then you are back on it. What helps against blacklists
421 4.7.0 Too many connections, try again later
Your newsletter needs to go out. Your own mail server gets blocked right away.

Every undelivered email can be a lost deal. It does not have to stay that way.

Basics in two paragraphs

What an SMTP relay does, and when you need one

An SMTP relay is a mail server that accepts your email and passes it on. Your application logs in with a username and password and hands over the message. The relay server takes care of everything after that: encryption, DKIM signing, queuing, retries and its reputation with the receiving servers.

A relay pays off in three situations. First, when your provider blocks sending: Microsoft 365 has switched off basic authentication, and many hosting providers block port 25 and cap the volume. Second, when your own IP address has a poor reputation because it rarely sends, sits in a data center range or has landed on a blacklist. Third, when volume or frequency grows: invoices, order confirmations, password emails and newsletters need SPF, DKIM and DMARC, a clean sender domain and someone who notices delivery problems before the customer calls.

That is exactly what MailBridge is: email delivery for your devices and applications, operated in Germany, with people you can actually reach. How SPF, DKIM and DMARC work together and what the portal checks is explained in our guide to SPF, DKIM and DMARC.

Status 250 Accepted

Set up your SMTP relay: one configuration, and your email flows.

You enter the MailBridge SMTP credentials in your device or software. From then on, we send your email through clean infrastructure with a strong reputation. We set up SPF, DKIM and DMARC for you. Blacklists, delivery rates and reputation are our job.

You enter SMTP credentials. Your email gets delivered. We take care of the rest.

Create your credentials

Your configuration, that is all it takes

Server	relay.mailbridge.email
Port	587 (STARTTLS)
Username	yourcompany-com
Password	••••••••••••
SPF	✓ set up by us
DKIM	✓ set up by us
DMARC	✓ set up by us

Setup usually under 15 minutes

Your own SMTP relay in three steps

Choose your volume

From Bridge 500 to Bridge 50K: the only thing you choose is how much you send. Everything else is included in every plan. Cancel monthly.
Set up your credentials

You get your SMTP credentials. We help you with the DNS configuration, step by step in the illustrated guide.
Send

Your devices and applications now send reliably. Done.

Entering the SMTP settings usually takes less than 15 minutes. DNS changes can take longer to become visible everywhere, depending on your provider. If you have questions, you reach a real person.

Start step 1

Why MailBridge

Six reasons, no buzzwords

Delivery you can count on

Monitored sending infrastructure, correct authentication, continuous blocklist monitoring. These are the technical foundations of reliable delivery. When something goes wrong, you see it in the portal instead of guessing.
Simple, no learning curve

No API, no developer skills needed. Enter the SMTP credentials and you are done. Works with any device and any software.
Germany and the GDPR

Servers located in Germany. Your data stays in the EU, with no transfers to third countries. GDPR-compliant without fine print.
Personal support

No chatbot, no ticket maze. You talk to people who know your setup, in English or German.
Transparent pricing

Fixed monthly prices, one plan model, no hidden costs. Extra volume costs €2.90 per 1,000 emails, and an automatic cost cap keeps your bill from exploding.
For everything that cannot do OAuth

Scanners, printers, ERP, CRM, monitoring, legacy software. MailBridge is the bridge.

Good fit? Three typical cases

Is MailBridge right for you?

IT managers · Microsoft 365

Microsoft 365 blocks your scanner

Your scanner, your ERP or your legacy software cannot do OAuth. MailBridge gives you SMTP credentials that work everywhere. Set it up once and it runs.

Set up SMTP credentials

Businesses · Delivery problems

Your email lands in spam

Your email lands in spam or your IP is on a blacklist. MailBridge sends through clean infrastructure with a strong reputation, including your newsletter. We handle reputation management.

Improve deliverability

Agencies · IT service providers

One contract, all client projects

WordPress sites, online stores or tools on client domains? The agency line brings it all together: separate credentials and domain per client, pause a client with one click, costs per client as a CSV export for Excel. Ready to bill on.

See how it works for agencies Or create an agency account right away

Verified Security & operations

Servers in Germany, GDPR and security

Servers located in Germany, data centers in Nuremberg and Falkenstein
GDPR-compliant, no data transfers to third countries
TLS-encrypted transport up to TLS 1.3, including older printers and scanners
SPF, DKIM and DMARC for authenticated, traceable sending
Automatic blocklist monitoring and help with listings
Operated by LOGIN SystemHaus, an IT service provider in Wiesbaden, Germany, since 1991
Cancel monthly, no minimum term

Pricing excl. VAT, monthly

Pricing you understand at a glance

One model, seven sizes: you pay for your email volume, everything else is included in every plan. Monthly, transparent, cancel anytime.

Bridge 500 to Bridge 50K

One plan. Everything included.

The only thing you choose is your volume: 500 to 50,000 emails a month. Managed reputation, servers in Germany, the portal and support are always included.

from €4.90 / month Choose a plan

Agency 10K to Agency 100K

All client projects in one contract

10,000 to 100,000 emails a month, shared freely across all clients. Separate credentials and domain per client, costs per client visible at once, ready to bill on.

from €29.90 / month See the agency plans

Compare all plans Over 50,000 emails? See Enterprise

All prices exclude VAT · Cancel monthly · Try Bridge free for 14 days or 100 emails, the agency line for 30 days or 500 emails

SMTP relay hosted in Germany.Your email gets delivered.

Sound familiar?

What an SMTP relay does, and when you need one

Set up your SMTP relay: one configuration, and your email flows.

Your own SMTP relay in three steps

Choose your volume

Set up your credentials

Send

Six reasons, no buzzwords

Delivery you can count on

Simple, no learning curve

Germany and the GDPR

Personal support

Transparent pricing

For everything that cannot do OAuth