Why Choose Keith Thomas
• 20 years of experience as a Senior Apple Support Specialist at Apple Computer UK HQ.
• Former Apple Computer UK Mac Support Specialist and Apple Authorised Service Provider background.
• Established and Independent since 2010 for on‑site Apple Support Service – no call centres, no outsourcing, no hardware repairs. Over 25,000+ Apple problems resolved. Unique on-site Apple Support Service. backed up with Independent Apple Telephone Support Assistance.
• Trusted by home users, small businesses, and professionals across London and the South East UK.• Clear, honest, software‑only support. No Hardware Repairs. Expert Apple Consultancy Service.
On‑site Apple Mac Support in London and the South East UK
What this page covers
This guide explains the real reasons the Apple Mail app stops working on a Mac, the steps you can try yourself, and when it’s time to get professional on‑site help. It applies to:
• iCloud Mail
• Gmail
• Outlook.com
• Exchange and Microsoft 365
• Yahoo and IMAP accounts
If Mail won’t send or receive emails, keeps asking for your password, freezes, or shows “Account Error”, this page is for you.
The most common reasons Mac Mail stops working
These are the issues that Keith Thomas identifies most often during on‑site visits:
• Incorrect password
• Mail app corruption
• Damaged Mail preferences
• macOS update issues
• Keychain conflicts
• Network restrictions
• Damaged mailbox index
• Corrupted user account
Quick checks you can do yourself
These steps solve around 60% of Mail issues.
Check 1 – Restart the Mac
A restart resets Mail and network services.
Check 2 – Restart the Mail app
Fully quit Mail and reopen it.
Check 3 – Check your password
Mail often stops working after password changes.
Check 4 – Update macOS
Mail fixes are often included in macOS updates.
If Mail shows “Account Error”
This usually means:
• Incorrect password
• Authentication issue
• Keychain conflict
Try:
• Re‑entering your password
• Removing old passwords from Keychain
• Restarting the Mac
If Mail won’t send emails
This usually means:
• Outgoing server issue
• Incorrect SMTP settings
• Network restrictions
Try:
• Mail → Settings → Accounts → Server Settings
• Restarting the Mac
• Turning Wi‑Fi off and on
If Mail won’t receive emails
This usually means:
• Authentication issue
• Damaged mailbox index
• Server connection issue
Try:
• Mail → Mailbox → Rebuild
• Restarting the Mac
• Updating macOS
If Mail is slow or freezes
This usually means:
• Large mailbox
• Background syncing
• Damaged Mail preferences
Try:
• Leaving Mail open for a few hours
• Restarting the Mac
• Closing apps using bandwidth
If Mail issues started after a macOS update
This usually means:
• Mail database reset
• Keychain reset
• Account re‑authentication required
Try:
• Re‑entering your email password
• Restarting the Mac
• Updating all apps
If Mail works on another user account
This usually means:
• Corrupted user account
• Damaged Mail preferences
• Permissions issues
Try:
• Testing Mail on another user account
• Restarting the Mac
• Reinstalling macOS without erasing data
When DIY stops working
You should get on‑site help if:
• Mail refuses to send or receive emails
• Mail crashes or freezes repeatedly
• macOS reinstall does not fix the issue
• Mailboxes are missing or corrupted
• You need your data preserved
These issues usually require:
• Mail and account configuration repair
• macOS recovery
• Data‑safe macOS reinstall
• User account repair
• Permissions and system file diagnostics
On‑Site Apple Mac Support – London & South East UK
If Mac Mail is not working, Keith Thomas provides an often same‑day on‑site support service across:
• Central London
• West, North, South and East London
• Surrey
• Berkshire
• Hampshire
• Wiltshire
Keith Thomas is a Mac Support Specialist in:
• Apple Mail and email account issues
• Microsoft 365 and Outlook configuration
• macOS configuration repair
• Data‑safe macOS recovery
• macOS reinstall and repair
• New Mac setup and migration
• User account and permissions diagnostics
Book on‑site help in London and the South East UK
If Mac Mail is not working, Keith Thomas can visit your home or office and get you working again.
Keith Thomas – Apple Mac Support Specialist
Established 2010 – Open 09:30–20:30, 7 Days
Contact Keith Thomas by Telephone: 07800 940756 or by Text to: 07800 940756, or simply complete an online website contact form 24/7