Week 10 - Email Analysis (L31-L34) Flashcards
What is an MX record?
DNS record for mail server. Points to mail server within a domain.
What are POP and IMAP?
Protocols to send emails. POP (110) and IMAP (143);
POP: Post Office Protocol, deletes email from mail server;
IMAP: Internet Message Access Protocol; can manage online mailboxes
An email itself consists of what parts?
Attachments, body, email header, envelope header
What is multipart/alternative?
If emails is send in HTML and text format.
What is MIME? What’s part of a MIME header?
Multipurpose Internet Mail extension. Extension to encode various data types in emails.
- MIME header
- Content-Type
- Content-Transfer-Encoding
What are multipart messages?
EMails with various content-types. Mainly used when email attachments are sent.
Explain MUA, MTA, MDA?
Mail User Agent: email client;
Mail Transfer Agent: Mail server;
Mail Delivery Agent: Delivers emails locally
Explain SMTP process?
HELO mail server.
MAIL FROM:
RCPT TO:
DATA
Subject
From:
To: adsfasdf
QUIT
Email passes through which four system (at minimum)?
Email client; Outgoing mail server; Incoming mail server; Recepient email client
What is a store and forward system?
Technique used in email communication. Mail get pushed from the client to the outgoing mail server. Mail gets stored, held and at a later pointer forward to next intermediary server or destination server.
What are the two parts of an email address?
User + Domain
What is ESMTP?
Extended SMTP. Adds support for security and support for other formats like audio, video, images.
SMTP is a push protocol. Please explain.
Only used to send emails and not to receive emails. Client pushes email to outgoing mail server. Mail server pushes email to next server and so on.
What is encoding?
Encoding is the process of bringing data from one format into another. e.g. ASCII to hex. Binary to Base64, etc
