MTA
Definition
Mail Transfer Agent. The server that relays mail server-to-server. Postfix, Exim, Sendmail and Microsoft Exchange are the common implementations. Speaks SMTP.
Related terms
- DKIM
- DomainKeys Identified Mail. A cryptographic signature placed in a DKIM-Signature header. The signing key sits on the sending server; the public key...
- DMARC
- Domain-based Message Authentication, Reporting and Conformance. A DNS policy that stacks on top of SPF and DKIM, telling receivers what to do...
- MUA
- Mail User Agent. The client the user sees. Outlook, Thunderbird, Apple Mail, Gmail web, Spark, mobile apps. Speaks SMTP outbound and IMAP...
- Received Header
- A header line prepended by each mail server that accepts a message in transit, recording the server's own identity, the IP or...
- SPF
- Sender Policy Framework. A DNS TXT record on the sender domain that lists the IP addresses authorised to send mail for that...
Explained in
- Email Forensics: Protocols, Header Tracing, Spoofed MailMail Transfer Agent. The server that relays mail server-to-server. Postfix, Exim, Sendmail and Microsoft Exchange are the common implementations. Speaks SMTP.