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Read receipts and tracking pixels in e-mail: what they tell you and what they do not

The short answer: knowing whether someone read your e-mail seems useful, but it is unreliable. A read receipt depends on the recipient agreeing; the “tracking pixel” (a tiny image) is…

MozOut - United States www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseE-mail

Outlook is not syncing: missing e-mails and folders that do not update

The short answer: when Outlook stops showing new mail, or a folder freezes in time, it is nearly always one of four things: Outlook is offline, the account is POP…

MozOut - United States www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseE-mail

IMAP folders, flags and IDLE: how push e-mail works and why a folder lags behind

The short answer: with IMAP the mail lives on the server, and what your program shows is a reflection of three things: the folders (which exist on the server), each…

MozOut - United States www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseE-mail

Which e-mail addresses a business should create: role addresses and personal ones

The short answer: create two kinds. Role addresses (such as info@, sales@, support@) are what customers see and that someone else can take over when a person leaves. Personal addresses…

MozOut - United States www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseComparisons and alternatives

IMAP or Exchange ActiveSync: what changes for e-mail, calendar and contacts

The short answer: IMAP handles mail only; sending goes over SMTP, and calendar and contacts travel over two other protocols (CalDAV and CardDAV). Exchange ActiveSync is a Microsoft protocol that…

MozOut - United States www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseE-mail

Duplicate e-mails in Outlook: where they come from and how to stop them

The short answer: duplicate e-mails in Outlook are almost never the sender sending twice. They come from the same account set up twice, a POP account downloading what it already…

MozOut - United States www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseE-mail

How an e-mail travels: SMTP to the MX server, then IMAP or POP to the reader

The short answer: an e-mail travels in three legs, and each leg uses a different protocol. First, your program hands the message to your server over SMTP, with a username…

MozOut - United States www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseComparisons and alternatives

TLS or end-to-end encryption in e-mail: what each one protects, and when you need it

The short answer: TLS encrypts the message on the way: between your device and our server, and between servers when both sides accept it. Once delivered, the message sits readable…

MozOut - United States www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseE-mail

Your e-mails land in Gmail spam or Promotions: what Show original tells you and what to fix

The short answer: when a customer says your message ended up in Gmail spam, the first thing to do is see what Gmail made of it. In a Gmail account…

MozOut - United States www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseE-mail

Building an HTML e-mail that displays everywhere: width, images and dark mode

The short answer: an e-mail is not a web page. Each mail program (Gmail, Outlook, the phone) shows it its own way and many ignore what is modern. To look…