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Which settings should I use to set up my e-mail?
Use your full e-mail address as the user name, and the server mail.horus.ch:
- IMAP (recommended): port 993 (SSL/TLS) or 143 (STARTTLS)
- POP: port 995 (SSL/TLS) or 110 (STARTTLS)
- SMTP (sending): port 587 (STARTTLS), with authentication
Full details and video tutorials are on the Support page.
IMAP or POP: which one should I choose?
IMAP, in most cases. Your messages stay on the server and are synchronised across all your devices (computer, smartphone, webmail). POP downloads messages to a single device: handy if you only want to keep them locally, but they will no longer appear elsewhere.
How can I read my e-mails in a browser?
With our webmail, from any computer or smartphone: rainloop.horus.ch. Log in with your full e-mail address and your usual password. The former webmail (Roundcube) is still available at webmail.horus.ch.
Does my old user name (user+domain.ch) still work?
Yes. You can now simply use your full e-mail address as your user name, but the former user+domain.ch format still works: there is no need to change a configuration that works.
My e-mails to Hotmail or Outlook are rejected (error 550 5.7.1). What should I do?
Since 5 November 2026, Microsoft has been rejecting some e-mails sent from domains without a DMARC record. We have added this record to all the domains we host. If one of your messages was rejected, simply send it again: Microsoft does not retry on its own. More details in our article (in French).
Web hosting
Can I install WordPress, Drupal or Joomla?
Yes. Our hosting plans work with WordPress, Drupal, Joomla, Typo3 and most PHP applications. Several PHP versions are available, with MariaDB or PostgreSQL databases.
Is my website secured with HTTPS?
Yes, free of charge: we install a Let’s Encrypt SSL certificate that renews automatically. All data exchanged between your website and its visitors is encrypted.
How do I manage my databases?
With phpMyAdmin, included in our hosting plans. For security reasons, its address is not published: you will find access in your customer area, or from our support team.
Solar energy
Does my website really run on solar energy?
Our servers run day and night; the sun doesn’t. We feed our production into the power grid, which supplies our servers continuously. Over the year, our plants produce far more than our infrastructure consumes, so every kWh used by your website is offset by a solar kWh we produced ourselves, in Switzerland. Learn more.
Where is my data hosted?
In Switzerland, on our own servers. Your data remains subject to Swiss law.
Account and billing
How do I pay my invoices?
By credit card in your customer area, or by bank transfer, ideally using the QR-bill attached to your invoice. Our bank details are on the Contact page.
How do I order hosting or another service?
Choose your product on the Order page and fill in the form: we will contact you shortly to set everything up. For a custom offer, write to us.