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Setting an out-of-office reply (autoresponder) on a mailbox

You will be away for a few days and want whoever writes to you to get a notice straight away: “I am away until day X, and Y is handling…

MozOut www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseVPS & Servers

My cron job does not run on the VPS: the usual causes

When a cron job does not run on a VPS, the cause is almost never cron itself: it is the environment it runs in. cron starts with a minimal environment,…

MozOut www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseVPS & Servers

Linux file permissions on a VPS: chmod, chown and Permission denied

A “Permission denied”, or a 403 on a website, is almost always one of two things: the file’s owner is not who the service runs as, or a permission is…

MozOut www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseDomains & DNS

The SOA record and its serial number: what each field means and when it matters

The short answer: the SOA (Start of Authority) is the first record in every DNS zone. It names the primary nameserver and the person responsible for the zone, and it…

MozOut www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseDomains & DNS

Checking DNS from the command line: dig and nslookup, and how to read the answer

The short answer: dig and nslookup ask the DNS directly what it answers for a name. They are the quickest way to know whether a change has arrived, where your…

MozOut www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseSecurity

HSTS explained: forcing https for good, and the trap of switching it on too early

The short answer: HSTS is an instruction your site gives the browser: “from now on, talk to me only over https, for X amount of time, do not even try…

MozOut www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseVPS & Servers

Running a mail server on your VPS with Postfix: why it is hard, and the alternative

Installing Postfix takes minutes; getting the mail to reach other people’s inboxes is the real work. A new mail server, on an IP with no history, is treated with suspicion…

MozOut www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseSEO & Marketing

A helpful 404 page: what it should say and how to check it works

The short answer: the 404 page is what a visitor sees when the address does not exist. A good one says so clearly, keeps the site’s menu and shows a…

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

Other e-mail apps on your phone: Gmail, Samsung Email and Outlook, with the same settings

The short answer: your domain’s e-mail works in any app that accepts an IMAP account. The settings are always the same; what changes is where each app asks for them.…

MozOut www.my.mozout.com › My MozOut › Knowledge Base Knowledge baseDomains & DNS

Registrar lock: what it protects, when to unlock it and when to leave it on

The short answer: the registrar lock is a padlock on the domain that stops it being transferred to another provider unless you authorise it. It should be on almost always,…