Postfix 2.6
Postfix 2.6
The Postfix 2.6 reached end of service life on Feb 11, 2013 — Postfix no longer ships security patches or fixes for it. Our third-party support keeps it safe to run: 24/7 engineers manage issues, remediate vulnerabilities, and help you maintain compliance.
24/7 engineers own your Postfix 2.6 incidents end to end.
Mitigation and patch-around guidance when the vendor no longer ships fixes.
Controls evidence and documentation that keep auditors satisfied.
Specifications
- product
- postfix
- release
- 2.6
- product Label
- Postfix
- release Label
- 2.6
- codename
- lts
- latest Version
- 2.6.19
- release Date
- 2009-05-12
- maintained
- source Url
- https://endoflife.date/postfix
Lifecycle Dates
- End of Service Life
- Feb 11, 2013
- Last OEM Support
- Feb 11, 2013
OEM vs. 3rd Party Support
See how third-party support compares to the vendor contract for Postfix 2.6 — monitoring, break/fix, vulnerability work, operations and compliance, before and after EOSL.
| Feature | OEM Support | 3rd Party Support |
|---|---|---|
| Post-EOSL Support | ||
| Break/Fix Support | Until EOSL | |
| 24/7 Monitoring | ||
| Vulnerability Scanning & Remediation | ||
| Managed Operations | ||
| Procedure & Configuration Review | ||
| Compliance & Audit Documentation | Limited | |
| Discounted Migration to Other Platforms |
Why Choose 3rd Party Support for Postfix 2.6?
Vulnerability Remediation
Scanning, mitigation and patch-around guidance for Postfix 2.6 when the vendor no longer ships fixes.
Compliance Maintenance
Procedure review, controls evidence and the documentation auditors ask for — maintained continuously, not scrambled at audit time.
24/7 Expert Support
Engineers who know this release monitor, manage and fix issues around the clock — break/fix to managed operations.
Postfix 2.6 Support: Frequently Asked Questions
Is the Postfix 2.6 still supported?
Postfix ended support for the Postfix 2.6 on Feb 11, 2013 — no more patches or fixes from the vendor. Third-party support keeps it covered: our engineers manage issues, remediate vulnerabilities, and help you maintain compliance for as long as you run it.
When is the Postfix 2.6 end of service life (EOSL) date?
Postfix lists the end of service life for the Postfix 2.6 as Feb 11, 2013.
Can I keep using the Postfix 2.6 after its EOSL date?
Yes. EOSL means Postfix stops issuing patches and support — the software itself keeps running. Third-party support covers it from there: issue management, security vulnerability remediation, and the compliance documentation auditors ask for, for as long as you choose to run it.
How much does third-party support for the Postfix 2.6 cost?
Typically 40-70% below the OEM maintenance renewal price. Exact pricing depends on quantity, service level and location — request a quote and we respond within 24 hours.
Known Vulnerabilities Affecting Postfix 2.6
8 published CVEs affect the Postfix 2.6, including 1 rated critical or high severity. Postfix no longer ships security patches for this release — our engineers provide mitigation guidance, workarounds and hardening support.
| CVE | Severity | CVSS | Published | Summary |
|---|---|---|---|---|
| CVE-2017-10140 | HIGH | 7.8 | Apr 16, 2018 | Postfix before 2.11.10, 3.0.x before 3.0.10, 3.1.x before 3.1.6, and 3.2.x before 3.2.2 might allow local users to gain privileges by leveraging undocumented functionality in Berkeley DB 2.x and later, related to reading settings from DB_CONFIG in the current directory. |
| CVE-2011-1720 | MEDIUM | 6.8 | May 13, 2011 | The SMTP server in Postfix before 2.5.13, 2.6.x before 2.6.10, 2.7.x before 2.7.4, and 2.8.x before 2.8.3, when certain Cyrus SASL authentication methods are enabled, does not create a new server handle after client authentication fails, which allows remote attackers to cause a denial of service (heap memory corruption and daemon crash) or possibly execute arbitrary code via an invalid AUTH command with one method followed by an AUTH command with a different method. |
| CVE-2011-0411 | MEDIUM | 6.8 | Mar 16, 2011 | The STARTTLS implementation in Postfix 2.4.x before 2.4.16, 2.5.x before 2.5.12, 2.6.x before 2.6.9, and 2.7.x before 2.7.3 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack. |
| CVE-2008-2936 | MEDIUM | 6.2 | Aug 18, 2008 | Postfix before 2.3.15, 2.4 before 2.4.8, 2.5 before 2.5.4, and 2.6 before 2.6-20080814, when the operating system supports hard links to symlinks, allows local users to append e-mail messages to a file to which a root-owned symlink points, by creating a hard link to this symlink and then sending a message. NOTE: this can be leveraged to gain privileges if there is a symlink to an init script. |
| CVE-2023-51764 | MEDIUM | 5.3 | Dec 24, 2023 | Postfix through 3.8.5 allows SMTP smuggling unless configured with smtpd_data_restrictions=reject_unauth_pipelining and smtpd_discard_ehlo_keywords=chunking (or certain other options that exist in recent versions). Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because Postfix supports <LF>.<CR><LF> but some other popular e-mail servers do not. To prevent attack va |
| CVE-2026-43964 | LOW | 3.7 | May 4, 2026 | Postfix before 3.8.16, 3.9 before 3.9.10, and 3.10 before 3.10.9 sometimes allows a buffer over-read and process crash via an enhanced status code that lacks text after the third number. |
| CVE-2008-3889 | LOW | 2.1 | Sep 12, 2008 | Postfix 2.4 before 2.4.9, 2.5 before 2.5.5, and 2.6 before 2.6-20080902, when used with the Linux 2.6 kernel, leaks epoll file descriptors during execution of "non-Postfix" commands, which allows local users to cause a denial of service (application slowdown or exit) via a crafted command, as demonstrated by a command in a .forward file. |
| CVE-2008-2937 | LOW | 1.9 | Aug 18, 2008 | Postfix 2.5 before 2.5.4 and 2.6 before 2.6-20080814 delivers to a mailbox file even when this file is not owned by the recipient, which allows local users to read e-mail messages by creating a mailbox file corresponding to another user's account name. |