Signature Detail
Short Name |
SMTP:RESPONSE:RLY-ACC-DENIED |
|---|---|
Severity |
Low |
Recommended |
No |
Category |
SMTP |
Keywords |
Response Relay Access Denied |
Release Date |
2003/04/22 |
Update Number |
1213 |
Supported Platforms |
idp-4.0+, isg-3.0+, j-series-9.5+, mx-9.4+, srx-9.2+, srx-branch-9.4+, vsrx-12.1+ |
SMTP: Response Relay Access Denied
This signature detects SMTP server responses that are generated when an unsuccessful attempt is made by a known spammer to relay e-mail through your SMTP port. If the SMTP server is configured to refuse connections from spamming Web sites, attackers receive a "550 Access Denied" error message.
Extended Description
A "Relaying Denied" SMTP response message detected in untrusted network could indicate a malicious party is attempting to abuse the mail server to transmit unsolicited messages.
References
- CVE: CVE-1999-0512