email-client

问题 Data URIs are a standard way to embed images and other binary data in HTML, and browser support is well documented on the web. (IE8 was the first version of IE to support Data URI, with a max 32 KB size per URI; other major browsers have supported it even longer.) My question is about desktop email and webmail client software. When building HTML email, standard practice is either to include images as attachments or load them externally (i.e. tracking images). Both of these have disadvantages

问题 These ports 465 and 587 are both used for sending mail (submitting mail) but what is the real difference between them? 回答1: SMTP protocol: smtps (port 465) v. msa (port 587) Ports 465 and 587 are intended for email client to email server communication - sending out email using SMTP protocol. Port 465 is for smtps SSL encryption is started automatically before any SMTP level communication. Port 587 is for msa It is almost like standard SMTP port. MSA should accept email after authentication (e