Postmaster information

Most likely you are visiting this page due to issues with our mail systems. Please refer to the information below for help, and contact postmaster@ipfire.org only if your question was not answered.

Mail servers

IP address	FQDN and PTR	Location
81.3.27.42	mail01.ipfire.org	DE
2001:678:b28::25	mail01.ipfire.org	DE

Message size limit

Our mail infrastructure processes up to 100 MiB per message. Please consider alternate submission channels (mirror, rsync, ...) for bigger files.

Transport encryption

The mail server supports transport encryption using STARTTLS with TLSv1 to TLSv1.3 (preferred), with opportunistic DANE support enabled. Certificate is provided in both SMTP server and client scenario, and can be by using DANE. ipfire.org is DNSSEC-signed.

Acceptable Use Policy

1. A message must not be delivered from an IP address listed at common RBLs, such as Spamhaus. These includes IP ranges used for dial-up purposes. Choice of RBLs was made based on eco. e.V. recommendations (german only).
2. A message must not contain URLs whose FQDN is listed at common URIBLs, e.g. for hosting malware or phishing sites.
3. A message must not have attachments with double file extensions such as document.pdf.exe.
4. A message must not have nested archive attachments, which are often abused for bypassing AV scanners. Compress the stuff you want to send once, and consider changing compression algorithm if size does not fit afterwards.
5. A message must not have encrypted archive attachments. Use GPG or S/MIME instead.
6. A message must not have attachments with file extensions as follows:
   • ade (Microsoft Access Project Extension)
   • adp (Microsoft Access Project)
   • asx (Windows Media Audio/Video)
   • bas (Microsoft Visual Basic class module)
   • bat (batch file)
   • cmd (Microsoft Windows NT Command Script)
   • com (MS-DOS executable file)
   • cpl (system control file)
   • exe (executable file)
   • hlp (Microsoft Help file)
   • hta (HTML program)
   • inf (setup information)
   • ins (Internet Naming Service)
   • isp (Internet Communication Settings)
   • js (JavaScript file)
   • jse (JavaScript encoded file)
   • msc (Microsoft Console Program)
   • msi (Microsoft Installation Package)
   • msp (Microsoft Installation Patch
   • mst (Microsoft Installation Program or Visual Test Source file)
   • pcd (Photo CD file or Visual compiled script)
   • pif (MS-DOS Shortcut)
   • prf (Microsoft Outlook Profile file)
   • scf (Windows Explorer file)
   • scr (Microsoft Screensaver program)
   • sct (Windows Script File)
   • shb (Shell Scrap File)
   • shs (Shell Scrap Object)
   • vb (VBScript file)
   • vbe (encoded VBScript file)
   • vbs (VBScript file)
   • vsmacros (Visual Studio .NET binary-based macro project)
   • vss (Visio Stencil)
   • vst (Visio Template)
   • vsw (Visio Workspace file)
   • ws (Windows Script file)
   • wsc (Windows Script component)
   • wsf (Windows Script file)
   • wsh (Windows Scripting Host settings)
7. Delivering IP address must have a PTR set which resolves back to the IP address itself.