The Spark Team 
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Definition
💡 Conversation view is the setting that bundles a message and all its replies into one thread, instead of dropping each reply into your inbox as its own separate item. You open one thread, see the whole back-and-forth, and you're caught up.
What problem does conversation view solve
Picture this. You send a question at 9 a.m. By 3 p.m., there are six replies scattered through your inbox, each looking like a brand-new email. Without conversation view, you're stitching the story back together by hand, scrolling up and down trying to figure out who said what and when.
That's the actual problem conversation view solves. It keeps the full history of a discussion in one place, in order, so you're not hunting for "what did she say three replies ago?" Email clients like Spark group messages into threads automatically, no toggle required.
It's not just tidiness, either. When you can see the whole exchange at once, you respond faster and with more context. You're not guessing what's already been said, and you're less likely to ask a question that was already answered two replies up. That's the real payoff: fewer redundant replies, less time spent just catching up before you can actually respond.
How Gmail, Outlook, and Spark handle threading differently
Gmail and Outlook both turn conversation view on by default, but they don't treat it identically.
Gmail groups messages that share the same subject line and participants into a single thread, newest message at the bottom. You can toggle this off entirely if you'd rather see every message as its own line item, and Gmail's help documentation walks through the exact setting if you get stuck.
Outlook calls it "Show as Conversations," and it works similarly, though the newest message sits on top instead of the bottom. Little detail, but it trips people up when they switch between the two. Microsoft's own support page covers every version, including the web app.
Spark doesn't give you a toggle here. Every account you connect gets grouped into threads by subject, full stop. Spark's team has said they're not planning to add an option to disable it. If your workflow genuinely needs one-message-per-row, that's a real limitation. For most people, though, always-on threading is one less setting to manage.
Worth knowing if you're mobile-heavy: Gmail's Android app has its own separate conversation view toggle, tucked under the general settings for your account rather than the main desktop settings menu. Turn it off on your phone, and it stays on on your desktop, and vice versa, since the two aren't linked. If your inbox looks threaded on one device and flat on another, that's almost always why.
How to turn conversation view on or off
Changing this setting takes under a minute, but the steps aren't the same everywhere.
In Gmail:
- Open Gmail on your computer and hit the gear icon, then "See all settings."
- Scroll to the "Conversation View" section.
- Select "Conversation view on" or "Conversation view off."
- Click "Save Changes" at the bottom.
In Outlook:
- From any mail folder, open the View tab.
- Select "Show as Conversations" to toggle it on or off.
- Choose "All mailboxes" or "This folder" when prompted.
- In new Outlook or Outlook on the web, go to Settings > Mail > Layout, and choose your message organization preference instead.
In Spark:
- There's nothing to toggle. Threads are on by default and stay that way.
- If you want a workaround, you can mute a specific thread so its replies stop cluttering your inbox, but you can't disable threading app-wide. Keep in mind that muting is currently a mobile-only workaround. It kills the notifications for that specific discussion, though the messages will still sit in your inbox rather than being hidden entirely.
Problems turning conversation view
If your Conversation View setting looks like it's not sticking, or it's suddenly reverted to how it used to be without you touching anything, that's usually not a bug. It's more often an organization-wide Exchange policy overriding your personal setting, which shows up a lot in workplace accounts after an IT update or a mailbox migration. Re-toggling it repeatedly won't fix that, since the setting will just revert again the next time the policy syncs. If this happens on a work account, it's worth checking with IT directly rather than assuming something's broken on your end.
When conversation view helps, and when it just buries things
Conversation view earns its keep on anything ongoing: project threads, back-and-forth negotiations, planning a trip with five people, anywhere the context builds over multiple replies.
Transactional mail is a different story, so turn it off there if your client allows it, since receipts, alerts, and one-off requests don't really benefit from threading, and some people find grouped notification emails harder to scan than separate ones.
It's also worth watching for scope creep in long threads: a thread that started as "quick question" can balloon into a 40-message chain covering five different topics, and when that happens, starting a fresh email with a clear subject line beats scrolling back through history. New topic, new thread.
And one habit worth building regardless: check who's actually on the reply before you send it. Threading makes it easy to respond without thinking about who's included, and that's exactly how CC lists balloon out of control inside a long-running thread.