Protocol (SMTP) is an Internet standard communication protocol for electronic mail transmission. Mail servers and other message transfer agents use SMTP to send...

SMTPS (Simple Mail Transfer Protocol Secure) is a method for securing the SMTP using transport layer security. It is intended to provide authentication...

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...

This is a list of Simple Mail Transfer Protocol (SMTP) response status codes. Status codes are issued by a server in response to a client's request made...

SMTP, Inc. is a provider of transactional email relay services. SMTP, Inc. is a cloud service provider that specializes in sending outgoing email for large...

Simple Mail Transfer Protocol (SMTP), to send the message content to the local mail submission agent (MSA), in this case smtp.a.org. The MSA determines the...

SMTP proxies are specialized mail servers that, similar to other types of proxy servers, pass simple mail transfer protocol (SMTP) sessions through to...

POP before SMTP or SMTP after POP is a method of authentication used by mail server software which helps allow users the option to send e-mail from any...

An open mail relay is a Simple Mail Transfer Protocol (SMTP) server configured in such a way that it allows anyone on the Internet to send e-mail through...

monitoring. The STARTTLS command for IMAP and POP3 is defined in RFC 2595, for SMTP in RFC 3207, for XMPP in RFC 6120 and for NNTP in RFC 4642. For IRC, the...

times as users attempt invalid passwords. SMTP authentication is no exception. However, server-to-server SMTP transfers, which is where spam is injected...

The integration with SMTP email is specified in RFC 1521 and RFC 1522. Although the MIME formalism was designed mainly for SMTP, its content types are...

domain; if the domain is a domain name rather than an IP address then the SMTP client uses the domain name to look up the mail exchange IP address. The...

attempt to reject (or "block"), the majority of spam email outright at the SMTP connection stage. If they do accept a message, they will typically then analyze...

typically either an MSA or an MTA, two variations of the SMTP protocol. The email client which uses the SMTP protocol creates an authentication extension, which...

for a mail queue. This is not possible with SMTP when there are multiple recipients for a mail message. SMTP can only indicate successful delivery or failure...

Sendmail Smail SparkEngine Stalwart Mail Server Sun Java System Surgemail vSMTP WinGate WinWebMail XMail Zimbra ZMailer agorum core Apache James Axigen Bongo...

RFC 7671. Application specific usage of DANE is defined in RFC 7672 for SMTP and RFC 7673 for using DANE with Service (SRV) records. TLS/SSL encryption...

files. Base64 is also widely used for sending e-mail attachments, because SMTP – in its original form – was designed to transport 7-bit ASCII characters...

domain and their preferences. The sending agent then attempts to establish an SMTP connection, trying the host with the lowest "Priority" value first. The system...

protocol such as HTTP (port 80) with that for a non-proxied protocol such as SMTP (port 25). By attempting to make a connection to an IP address at which there...

Smtp-sink is a utility program in the Postfix Mail software package that implements a "black hole" function. It listens on the named host (or address)...

callout verification or Sender Address Verification, is a technique used by SMTP software in order to validate e-mail addresses. The most common target of...

back later"), as defined in the Simple Mail Transfer Protocol (SMTP). Fully capable SMTP implementations are expected to maintain queues for retrying message...

GMX mail via webmail, or using POP3 or IMAP4 protocols. Mail is sent using SMTP. Founded in 1997, GMX is a subsidiary of Ionos SE, a stock-listed company...

Transition of Internet Mail from Just-Send-8 to 8bit-SMTP/MIME. doi:10.17487/RFC1428. RFC 1428. SMTP as defined in RFC 821 limits the sending of Internet...

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...

to be the predominant form of email, but this role has been taken by the SMTP-based Internet e-mail. Despite this, it has been widely used within organizations...

intelligence, but most often refers to the automatic processing of messages at an SMTP server, possibly applying anti-spam techniques. Filtering can be applied...

message. The original base of Internet email, Simple Mail Transfer Protocol (SMTP), has no such feature, so forged sender addresses in emails (a practice known...