Mail client setup · Beginner · 10 minutes
How to set up email on your phone — Skip Autodiscover and Type Four Fields
The phone says it cannot verify the server, or it receives but will not send, and you want the four values that make both of those go away.
The short answer
Choose the manual or Other account type and enter the values from cPanel's Connect Devices page: mail.yourdomain.com, SSL on port 993 for IMAP and 465 for outgoing, with your full email address as the username. Autodetection routinely guesses wrong on a custom domain, and typing four fields by hand takes about ninety seconds.
Two settings account for nearly every failure afterwards. The username must be the complete address rather than the part before the @, and the outgoing server must authenticate with the same credentials as incoming — 'it receives but will not send' is that second one almost every time.
By the HostingFast team · Reviewed 24 August 2026
Beginner
Assumed skill
10 minutes
Time at the keyboard
5
Stages in the runbook
24/7
Engineers on shift
The mechanics are identical on iOS Mail, Gmail for Android and every third-party client; only the wording of the menus changes. What matters is refusing the branded preset and entering the server details yourself.
Use IMAP unless you have a specific reason not to. It keeps the mailbox on the server, so the phone, the laptop and webmail all show the same folders and the same read states rather than three private opinions.
Why autodetection fails on your domain
Branded presets look for the well-known providers, and a domain you own is not one of them. Some clients then guess at autoconfig records, and when those are absent they fall back to plausible-looking hostnames that do not exist. The result is a spinner, then a vague failure with no useful message.
Choosing Other, Manual or Advanced skips all of that guessing. You are not doing something advanced by taking that route — you are declining to let the client invent your server names.
The four values, and why the hostname is fixed
Incoming: mail.yourdomain.com, port 993, SSL. Outgoing: the same host, port 465, SSL. Take them from cPanel's Connect Devices page rather than from memory, because that page is generated from your account's actual configuration.
Use that hostname exactly, not an IP address and not the bare domain. Certificates are issued for names, so the client compares the name you typed against the name on the certificate — a mismatch is what produces 'cannot verify server identity', and it is a naming problem rather than a certificate problem.
The username is the whole address
The username field takes you@yourdomain.com, not 'you'. This single detail causes more failed logins on a custom domain than everything else on this page combined, and the error the phone shows is usually just 'incorrect password'.
Then find the outgoing server settings and enable authentication with the same credentials. Many clients leave outgoing authentication off by default, which produces a mailbox that receives perfectly and silently refuses to send.
Prove both directions, then think about battery
Send from the phone to an outside address, then reply back to it. Receiving proves IMAP, sending proves SMTP, and the pair together proves the account is finished. Do not accept 'the folders appeared' as evidence — folders appear before outgoing authentication has ever been tested.
Once it works, choose push or fetch deliberately. Push wakes the radio on every message, which is what you want for a mailbox people expect a fast reply from and not what you want on a low-traffic archive account. Fetch on a fifteen-minute schedule is the sensible default for the second kind.
Where the exact values live
Every runbook here was exercised on the platform we actually operate — cPanel, LiteSpeed, NVMe storage, one-click installs — so the Connect Devices page and the port numbers match yours rather than a generic host's.
Mailboxes on your own domain come as part of the plan — email is included, never sold back to you at checkout.
- Browser webmail plus IMAP, POP and SMTP for any mail app
- Email addresses that run on your own domain name
- Spam and virus screening on every mailbox as standard
- Human support on duty every hour of every day
Why HostingFast
Standard on every plan
Manual by design
You decline autodetection on purpose, which removes the entire class of failure it causes on custom domains.
Four exact values
Hostname, 993, 465, SSL — taken from the panel page generated from your own account rather than from memory.
The certificate error explained
'Cannot verify server identity' is a hostname mismatch, and knowing that turns a scary warning into a typo.
The send failure named
Outgoing authentication off is why a mailbox receives but will not send, and it is checked explicitly.
Tested both ways
Folders appearing is not proof. Sending out and replying back is, and it takes another thirty seconds.
Scoped honestly
Getting a domain mailbox onto a phone is a beginner-level job — about 10 minutes, including the test.
Quick Start
From order to online
- 1
Take the exact values from the panel
cPanel's Email Accounts screen has a Connect Devices link with the precise server names and ports: mail.yourdomain.com, SSL on 993 for IMAP and 465 for outgoing.
- 2
Choose Other rather than a branded preset
Pick the Other, Manual or Advanced account type. Autodetection looks for the big providers, then guesses at hostnames that do not exist on your domain.
- 3
Enter the full address as the username
you@yourdomain.com, not the part before the @. This causes more failed logins on custom domains than every other setting combined, and the phone just says the password is wrong.
- 4
Turn on outgoing authentication
The outgoing server must authenticate with the same credentials as incoming. 'It receives but will not send' traces back to this switch almost every time it is reported.
- 5
Test both directions, then set push or fetch
Send to an outside address and reply back — that proves SMTP and IMAP separately. Then choose push for a mailbox that needs fast replies, fetch on a schedule for one that does not.
Built In
Loaded onto every plan
- Browser webmail plus IMAP, POP and SMTP for any mail app
- Email addresses that run on your own domain name
- Spam and virus screening on every mailbox as standard
- Free SSL on every plan, renewed automatically before it can expire
- cPanel — the control panel most of the industry already runs
- Daily backups, with self-service restores you run from the panel
- Per-site PHP version switching from the control panel
- Human support on duty every hour of every day
- In-place account upgrades — no migration when you change plan
- A renewal price identical to the price you signed up at
Frequently Asked
What people ask us most often
Why does the phone say it cannot verify the server's identity?
The hostname you entered does not match the name on the certificate. Use mail.yourdomain.com — or exactly what the panel's connect-devices page specifies — rather than an IP address or the bare domain. Certificates are issued for names, so the client is comparing strings; correct the string and the warning disappears without anything being reissued.
Should I use push or fetch, and does it cost battery?
Push wakes the radio for each message, which is right for a mailbox people expect a quick reply from and wasteful on a low-traffic account. Fetch on a fifteen-minute schedule is the better default for the second kind. Either way, use IMAP: the state lives on the server, so switching the delivery method later changes nothing about your mail.
Who is behind HostingFast?
HostingFast is a trading name of Vitalcare at Home Ltd, registered in England and Wales — a real company with a public record and terms governed by English law. Running that check on any host before you hand over a domain is time well spent.
Will you migrate an existing site across for free?
Yes. Open a ticket with your current host's login details and we bring everything over — files, databases, mailboxes, configuration. You review the copy before DNS moves, and the old site keeps serving traffic until the new one is answering, so no visitor lands in a gap.
Keep reading
How to Enable WHOIS Privacy
Keep your personal address and telephone number off the public registration record — beginner, about 2 minutes.
How to Point a Domain to Your Hosting
Connect a domain registered anywhere to the account that will serve it, and know what the TTL is doing — beginner, roughly 10 minutes plus propagation.
Catch-All Email (Glossary)
One term, defined precisely, with the detail that matters when you are debugging rather than browsing.
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