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Mail server type
SMTP proxies are specialized mail servers that, similar to other types of proxy servers, pass simple mail transfer protocol (SMTP) sessions through to
SMTP_proxy
Computer system that receives and forwards requests
Distributed Checksum Clearinghouse FreeProxy Internet privacy InterPlanetary File System Proxy pattern SMTP proxy Virtual private network Web accelerator
Proxy_server
The Anti-Spam SMTP Proxy (ASSP) is an open-source, Perl-based, platform-independent transparent SMTP proxy server. Some ASSP's features are: Hidden Markov
Anti-Spam_SMTP_Proxy
Methods to prevent email spam
enable them, leaving the receiving SMTP server no effective way to validate the sender's email address. SMTP proxies allow combating spam in real time
Anti-spam_techniques
SMTP daemon
qpsmtpd is an SMTP daemon written in Perl. It was originally designed to be a drop-in replacement for qmail-smtpd, the SMTP component of qmail, and it
Qpsmtpd
Extension of Internet protocol
SMTP Authentication, often abbreviated SMTP AUTH, is an extension of the Simple Mail Transfer Protocol (SMTP) whereby a client may log in using any authentication
SMTP_Authentication
Zimbra Apache James Cyrus IMAP server Stalwart Mail server Anti-Spam SMTP Proxy Axigen Bogofilter Clearswift Secure Email Gateway DSPAM fdm Gordano Messaging
List_of_mail_server_software
Anti-spam technique involving deliberately delaying responding to connections
implemented for SMTP tarpits, systems that plug into the Mail Transfer Agent (MTA, i.e. the mail server software) or sit in front of it as a proxy.[citation
Tarpit_(networking)
Open source web server and a reverse proxy server
certificates using the ACME protocol TLS/SSL support STARTTLS support SMTP, POP3, and IMAP proxy Requires authentication using an external HTTP server or by an
Nginx
Canadian technology company
filters. The company's first product was an SMTP proxy that provides tar-pitting and transparent SMTP proxy functionality for inbound email filtering.
MailChannels
Techniques aimed at providing verifiable information about the origin of email messages
through a mailing list or a forwarding service. B can be an outbound SMTP proxy or a smarthost. If the local network does not block outbound port 25 connections
Email_authentication
Voice-over-IP communications protocol
VoLTE. SIP is a text-based protocol modeled on the structure of HTTP and SMTP, enabling interoperability and integration with other Internet applications
Session_Initiation_Protocol
Internet protocol that uses a proxy server
through a proxy server. SOCKS5 optionally provides authentication, so only authorized users may access a server. Practically, a SOCKS server proxies TCP connections
SOCKS
pages List of FTP server return codes List of HTTP header fields List of SMTP server return codes Common Log Format x402 – an open standard for that repurposes
List_of_HTTP_status_codes
FLOSS SMTPd in JavaScript based on Node.js
and forward to a qmail based message store. SMTP Authentication via LDAP, vpopmaild, flat_file, or SMTP proxy. Access control by domain, IP, sender, or
Haraka_(software)
Services roughly divide into Proxy related services and Internet Server related services. Proxy services include HTTP, SMTP, POP3, SOCKS, FTP and a generalized
FreeProxy
over SMTP Verified with https://starttls-everywhere.org/ or other SPF is configured and outbound mail passes SPF test from default webmail and SMTP Outbound
Comparison of webmail providers
Comparison_of_webmail_providers
ActiveState Amavis — content filter for email Anti-Spam SMTP Proxy — open-source transparent SMTP proxy server AWStats — Web analytics reporting tool AxKit
List of Perl software and tools
List_of_Perl_software_and_tools
HTTP accelerator software
Vinyl Cache is focused exclusively on HTTP, unlike other proxy servers that often support FTP, SMTP, and other network protocols. The project was initiated
Vinyl_Cache
Open-source email content filter
classical after-queue mail filtering setup, or amavisd can be used as an SMTP proxy filter in a before-queue filtering setup, or the amavisd process can be
Amavis
Open source component of zero configuration networking
Apple's Bonjour Sleep Proxy service is an open source component of zero-configuration networking, designed to assist in reducing power consumption of
Bonjour_Sleep_Proxy
use of the victim machine, which serves as a proxy for the request, similar to an Open mail relay using SMTP. This technique can be used to port scan hosts
FTP_bounce_attack
Incorrectly automated bounce messages
forward mail can avoid generating backscatter by using a transparent SMTP proxy. Mail servers sending email bounce messages can use a range of measures
Backscatter_(email)
Commercial service for proxied Internet access
A virtual private network (VPN) service is a proxy server marketed to help users bypass Internet censorship such as geo-blocking and users who want to
VPN_service
Overview of and topical guide to Perl
command. Other options for stream editing include AWK and Perl. Anti-Spam SMTP Proxy AxKit BackupPC Big Medium BioMOBY BioPerl Bonsai Bricolage Catalyst CGIProxy
Outline of the Perl programming language
Outline_of_the_Perl_programming_language
Free URL data transfer client software
LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET, TFTP, WS and WSS. libcurl supports HTTP versions 0.9, 1.0, 1
CURL
Password cracking software
HTTP-Proxy, ICQ, IRC, LDAP, MS-SQL, NNTP, Oracle Listener, Oracle SID, PC-Anywhere, PC-NFS, PostgreSQL, RDP, Rexec, Rlogin, Rsh, SIP, SMTP, SMTP Enum
Hydra_(software)
Processing of email to organize it according to specified criteria
service providers is transparent SMTP proxying, in which email traffic is intercepted and filtered via a transparent proxy within the network. Outbound filtering
Email_filtering
Software program
similar to greylisting. Originally, the authors conceived an MT Proxy to rate-limit the SMTP connections of messages believed to be spam. That worked by adding
Stockade_(software)
Application layer protocol
resources and reuse them, whenever possible, to reduce network traffic. HTTP proxy servers at private network boundaries can facilitate communication for clients
HTTP
Extension of SOAP
services implement HTTP bindings, in theory other bindings such as JMS or SMTP could be used; in this case end-to-end security would be required. Even if
WS-Security
Open-source webmail application written in PHP
via the IMAP protocol and sends messages through SMTP. The project also includes a separate IMAP proxy server written in C. Both components are released
SquirrelMail
Type of computer security exploit
performs the second request, it could use different protocols (e.g. FTP, SMB, SMTP, etc.) and schemes (e.g. file://, phar://, gopher://, data://, dict://, etc
Server-side_request_forgery
Messaging protocol for web services
over SMTP, JMS and message queues. SOAP, when combined with HTTP post/response exchanges, tunnels easily through existing firewalls and proxies, and consequently
SOAP
HTTP header field
so it is not limited to HTTP. Internet privacy List of proxy software X-Originating-IP for SMTP equivalent List of HTTP header fields "Overview of parsed
X-Forwarded-For
ports. TCP port 465 was originally assigned to allow the use of SMTP over SSL (SMTPS), but practical concerns meant that it was left unused and according
List of TCP and UDP port numbers
List_of_TCP_and_UDP_port_numbers
HTTP extension supporting TLS encryption
IMAP IPP IRC LDAP MGCP MQTT NNTP NTP OSPF POP PTP ONC/RPC RTP RTSP RIP SIP SMTP SNMP SSH Telnet TLS/SSL XMPP more... Transport layer TCP UDP DCCP SCTP RSVP
HTTPS
American technology company
domain registration. The company's services act primarily as a reverse proxy between website visitors and a customer's hosting provider, improving performance
Cloudflare
Topics referred to by the same term
people employed in the occupational health and safety field Anti-Spam SMTP Proxy, an anti-spam product Anjuman Sipah-e-Sahaba Pakistan, a political movement
ASSP
Free software TLS/SSL tunneling implementation
provide a secure SSL connection to an existing non-SSL-aware SMTP mail server. Assuming the SMTP server expects TCP connections on port 25, the stunnel would
Stunnel
Addressing format
could be freely and directly reached worldwide, in much the same way that SMTP e-mail recipients may be contacted from anywhere at almost no cost to the
SIP_URI_scheme
Computer network management and monitoring protocol
SNMPv1/v2c coexistence strategies: proxy agents and bilingual network-management systems. An SNMPv2 agent can act as a proxy agent on behalf of SNMPv1-managed
Simple Network Management Protocol
Simple_Network_Management_Protocol
Domino Documentation - Restricting SMTP inbound routing". help.hcl-software.com. 30 June 2024. "Configuring the Domino SMTP server to reduce spam". help.hcl-software
Comparison_of_mail_servers
Software company
Directory Server iPlanet Instant Messaging Server iPlanet Messaging Server (a SMTP, IMAP, POP3 and webmail mail server) iPlanet Meta Directory iPlanet Portal
IPlanet
Linux distribution
(IPsec, PPTP, OpenVPN) Web proxy, with content filtering and antivirus (Squid, DansGuardian) E-mail services (Webmail, Postfix, SMTP, POP3/s, IMAP/s) Groupware
ClearOS
Computer security mechanism
as an open proxy. It can often take form as a server designed to look like a misconfigured HTTP proxy. Probably the most famous open proxy was the default
Honeypot_(computing)
Multimedia Messaging Service standards
and other messaging systems. Using SMTP. MM4: the interface between MMSC and foreign network providers. Using SMTP. MM5: the interface between MMSC and
MMS_Architecture
Framework for authentication and data security in Internet protocols
application protocol that uses SASL. Authentication mechanisms can also support proxy authorization, a facility allowing one user to assume the identity of another
Simple Authentication and Security Layer
Simple_Authentication_and_Security_Layer
Cryptographic protocols for securing data in transit
RFC 3207 – "SMTP Service Extension for Secure SMTP over Transport Layer Security," Proposed Standard. Specifies an extension to the SMTP service that
Transport_Layer_Security
Protocol to encrypt DNS using elliptic curve cryptography
recognizes and discards forged DNS packets, providing some protection, though SMTP, HTTP, HTTPS, are also vulnerable to DoS. DNSCurve uses Curve25519 elliptic
DNSCurve
Specialized Internet application protocol
error Not implemented Bad gateway Service unavailable Gateway timeout Proxying not supported Signaling Codes: 7.XX Unassigned CSM Ping Pong Release Abort
Constrained Application Protocol
Constrained_Application_Protocol
Stopper (RSS), spam relays, e.g. hijacked servers. Open Proxy Servers (OPS), naively open SMTP servers. Non-confirming Mailing List (NML), marketers who
Mail_Abuse_Prevention_System
Linux distribution
Forwarding Scheduler for automated backups Transparent HTTP, HTTPS, FTP, SMTP and POP3-Proxy server Caching DNS-Server DHCP-server (separately for the green,
Endian_Firewall
OSI standard for email
it to be the predominant form of email, but this role has been taken by SMTP-based Internet e-mail. Despite this, it has been widely used within organizations
X.400
Authentication networking protocol
In addition, the proxying server can be configured to add, remove or rewrite AAA requests when they are proxied over time again. Proxy Chaining is possible
RADIUS
Self-replicating malware program
attachment. When this is started, they will replicate by using their own SMTP agent engine. E-mail addresses that will be targeted by the virus are gathered
Sobig
DNS evasion technique against origin server fingerprinting
Although HTTP and DNS remain commonly proxied application protocols by the frontend flux-agents, protocols such as SMTP, IMAP and POP can also be delivered
Fast_flux
Network protocol
and Security Layer (SASL), it is often used in email software as part of SMTP Authentication and for the authentication of POP and IMAP users, as well
CRAM-MD5
Free software e-mail client
Trojitá ([trɔjɪtaː]) is a free software IMAP and SMTP email client developed using the Qt C++ library. The design goals of the maintainers are to develop
Trojitá
Protocol for real-time Internet chat and messaging
comparison to non-multicasting protocols such as Simple Mail Transfer Protocol (SMTP)[citation needed] or Extensible Messaging and Presence Protocol (XMPP)[citation
IRC
Internet protocol that helps identify the user of a particular TCP connection
port 113 in the IANA registry. oidentd (for Unix-like systems) SMTP NNTP SSH SOCKS proxies RFC 1413. IETF. doi:10.17487/RFC1413. "Service Name and Transport
Ident_protocol
Methods as to which email spam is delivered
messages sent to it from any location, to any recipient. In the original SMTP mail architecture, this was the default behavior: a user could send mail
Spam_email_delivery
System to identify resources on a network
DNS database are for start of authority (SOA), IP addresses (A and AAAA), SMTP mail exchangers (MX), name servers (NS), pointers for reverse DNS lookups
Domain_Name_System
Computer network protocol
resulting protocol was NNTP, which resembled the Simple Mail Transfer Protocol (SMTP) but was tailored for exchanging newsgroup articles. A newsreader, also known
Network News Transfer Protocol
Network_News_Transfer_Protocol
Associates addresses in the layers of a networked device implementation
from systems other than the one with the required Layer 2 address. An ARP proxy is a system that answers the ARP request on behalf of another system for
Address_Resolution_Protocol
Protocol in the Internet protocol suite used with IPv6
that is independent of IPsec. Neighbor Discovery Proxy (ND Proxy) provides a service similar to IPv4 Proxy ARP and allows bridging multiple network segments
Neighbor_Discovery_Protocol
Network protocol used by the Web
mechanism that has long been available in other Internet protocols like SMTP. Critics have stated that the HTTP/2 proposal goes in violation of IETF's
HTTP/2
TCP/IP application layer protocol
HTTP gateways or proxy server that converts Gopher menus into HTML; known proxies are the Floodgap Public Gopher proxy and Gopher Proxy. Similarly, certain
Gopher_(protocol)
Extensible web server software by Microsoft
Windows NT family. IIS supports HTTP, HTTP/2, HTTP/3, HTTPS, FTP, FTPS, SMTP and NNTP. It has been an integral part of the Windows NT family since Windows
Internet_Information_Services
combined "HTTP, HTTPS, XMPP, FTP, SMTP, POP3, DNS, DHCP, Java Servlet, JSP, and proxy server" developed by Tod Sambar. The proxy server also provided a dial-on-demand
Sambar_Server
Spam-deferral daemon
written under the umbrella of the OpenBSD project. spamd works directly with SMTP connections, and supports features such as greylisting, minimising false
Spamd
Collaborative software suite
machine and using container technology. It supports CalDAV, CardDAV and SMTP for messaging, LDAP for directory services, and Microsoft Active Directory
Zimbra
Free and open source project building an anonymous network
the I2P web console interface or using standard email protocols (i.e. IMAP/SMTP). All bote-mails are transparently end-to-end encrypted and signed by the
I2P
TCP/IP application layer protocol
software list covers client, server, libraries, and tools. Gemini-to-HTTP proxy server gateways such as Mozz.us can be used by web browsers lacking Gemini
Gemini_(protocol)
Computer communications protocol
method/command. A client issues the HTTP CONNECT command to an HTTP proxy. The proxy then makes a TCP connection to a particular server:port, and relays
Tunneling_protocol
Service in the Internet Protocol Suite
(or port 9 for the Discard Protocol) is also configured by default as a proxy to relay Wake-on-LAN (WOL) magic packets from the Internet to hosts on the
Echo_Protocol
Uniform address for services on a website
Binu; Brotman, Alex; Jones, Janet (September 6, 2018). "MTA-STS Policies". SMTP MTA Strict Transport Security (MTA-STS). IETF. sec. 3.2. doi:10.17487/RFC8461
Well-known_URI
Authentication system
Syslog protocol (client; RFC5424) SMTP, Simple Mail Transfer Protocol (RFC2821) SMTP Service Extension for Secure SMTP over TLS (RFC2487) The multiOTP class
MultiOTP
Communications protocol for message-oriented middleware
network architecture is reminiscent of the Simple Mail Transfer Protocol (SMTP), a client–server model; clients do not talk directly to one another as it
XMPP
Transport layer computer network protocol
provides Go bindings of libquic. Finally, quic-reverse-proxy is a Docker image that acts as a reverse proxy server, translating QUIC requests into plain HTTP
QUIC
Transmission Control Protocol technology
OS X 10.10, released on October 16, 2014 Alcatel-Lucent released MPTCP proxy version 0.9 source code on October 26, 2012 In July 2014, Oracle reported
Multipath_TCP
Natural number
consecutive primes (73 + 79 + 83 + 89 + 97), centered square number, also SMTP code meaning the transmission channel will be closing Country calling code
400_(number)
"Apache Module mod_proxy". Apache HTTP Server 2.4 Documentation. Apache Software Foundation. Retrieved 2026-04-30. "Apache Module mod_proxy_ajp". Apache HTTP
List_of_Apache_modules
Type of cyber attack
the protocol, (i.e. stamp, postal code) the Simple Mail Transfer Protocol (SMTP) will send the message. It can be done using a mail server with telnet. Geolocation
Spoofing_attack
Internet protocol that discards all input
to be accessible on session-oriented connections (for example via HTTP proxies or some virtual private network (VPN)). On most Unix-like operating systems
Discard_Protocol
Cryptographic network protocol
multiple intermediate hosts) For browsing the web through an encrypted proxy connection with SSH clients that support the SOCKS protocol. For securely
Secure_Shell
bandwidth (QoS) Network access via Proxy server Access to ArmCluster & ArmGrid Domain Name Service (DNS) E-Mail services (SMTP, POP, IMAP), Webmail, Mailing
ASNET-AM
Computer worm
second variant, Bagle.B, was considerably more virulent. Bagle used its own SMTP engine to mass-mail itself as an attachment to recipients gathered from the
Bagle_(computer_worm)
Use of software for integration
any application through a standard communication protocol, such as SOAP, SMTP or Action Message Format (AMF)). The adapter could reside in the same process
Enterprise application integration
Enterprise_application_integration
Unsolicited messages sent by email
vulnerable third-party systems such as open mail relays and open proxy servers. SMTP forwards mail from one server to another—mail servers that ISPs run
Email_spam
Rapid Web app development platform
retrieval from common enterprise systems such as Active Directory, LDAP, SMTP, POP, HTTP, FTP, Microsoft Exchange Server and common data formats such as
Adobe_ColdFusion
API management platform
the form of tags, binary documentation and documentation URLs. APIs can proxy an existing API or use an assembly where a flow is created. In such an assembly
IBM_API_Management
Group of communications protocols
GSM, UMTS, LTE and 5G NR radio networks. In 3GPP architectures, GTP and Proxy Mobile IPv6 based interfaces are specified on various interface points.
GPRS_Tunnelling_Protocol
Email system
develop more open solutions. IETF Lemonade is a set of extensions to IMAP and SMTP to make them more suited to the demands of mobile email.[citation needed]
Push_email
Defunct software company
a full-function multi-connection TCP and compatible SMTP for his bachelor's thesis, a mail proxy, it became possible to offer an FTP implementation -
FTP_Software
Google's experimental binary encoding of HTTP
for security and to avoid incompatibility when communication is across a proxy. SPDY does not replace HTTP; it modifies the way HTTP requests and responses
SPDY
version 11. Professional Edition. Windows 10 required. Zimbra Desktop supports SMTP auth, not sure about collaboration suite Online Certificate Status Protocol
Comparison_of_email_clients
Protocols and procedures to combat caller ID spoofing
simple headers like "From:" in a format similar to the SMTP email system. SIP requests are sent to proxy servers that provide access information for end-users
STIR/SHAKEN
Network protocol supporting distributed directory information services
ISBN 978-0-672-32316-4. Rhoton, J (1999). Programmer's Guide to Internet Mail: SMTP, POP, IMAP, and LDAP. Elsevier. ISBN 978-1-55558-212-8. Voglmaier, R (2003)
Lightweight Directory Access Protocol
Lightweight_Directory_Access_Protocol
Deprecated technical standard for data access over a cellular network
translates requests into plain HTTP. WAP decks are delivered through a proxy which checks decks for WML syntax correctness and consistency, which improves
Wireless_Application_Protocol
SMTP PROXY
SMTP PROXY
SMTP PROXY
SMTP PROXY
Boy/Male
Tamil
Surname or Lastname
English (Devon and Cornwall)
English (Devon and Cornwall) : topographic name for someone who lived by a tidal creek or an inlet of the sea, Old English pyll, or a habitational name from Pylle in Somerset, which was named with this word.English (Devon and Cornwall) : descriptive nickname for a small, rotund person, from Middle English, Old French pil(l)e ‘ball’.
Boy/Male
Celtic Scottish
Seaman.
Girl/Female
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sindhi, Telugu
Swift
Boy/Male
Tamil
Supreme consciousness
Boy/Male
Hindu
Prince, The Moon
Girl/Female
Muslim
Noble, Magnanimous
Girl/Female
Danish, Finnish, German, Greek, Polish, Swedish
Pure; Holy
Boy/Male
Muslim
Kind, Willing and wiseman
Female
Finnish
Finnish short form of longer names containing the element ink (ing), INKA means "foremost one."
SMTP PROXY
SMTP PROXY
SMTP PROXY
SMTP PROXY
SMTP PROXY
v. t.
To perform by proxy; to employ as a proxy.
n.
A writing by which one person authorizes another to vote in his stead, as in a corporation meeting.
pl.
of Proxy
n.
The agency for another who acts through the agent; authority to act for another, esp. to vote in a legislative or corporate capacity.
n.
A sum of money paid formerly to the bishop or archdeacon, now to the ecclesiastical commissioners, by an incumbent, as a commutation for entertainment at the time of visitation; -- called also proxy.
n.
The written appointment of a proctor in suits in the ecclesiastical courts.
n.
The person who is substituted or deputed to act or vote for another.
v. i.
To act or vote by proxy; to do anything by the agency of another.
n.
The office or agency of a proxy.
n.
See Procuration.
n.
A substitute; a proxy; an agent.
n.
The instrument by which a person is empowered to transact the affairs of another; a proxy.
n.
Authority to act for another; a proxy.