A new email address can look like a small admin job until messages stop arriving, a director cannot access their inbox on their mobile phone, or customer replies land in junk. To configure business email accounts properly, you need more than a username and password. The mailbox, domain settings, security controls and staff devices all need to work together from day one.
For a small London business, email is often the main route for enquiries, quotes, invoices and day-to-day decisions. A careful setup prevents avoidable downtime, protects sensitive information and gives your team a professional address they can rely on whether they are in the office, at home or out with a client.
Prepare before you configure business email accounts
Start with the domain name you want to use after the @ symbol. If you already have a website domain, your email should normally use the same one, such as name@yourcompany.co.uk. This makes the business easier to recognise and avoids the mixed appearance of staff using personal Gmail, Outlook.com or ISP addresses.
Decide who needs a full mailbox and who only needs an address that forwards elsewhere. A full mailbox suits anyone sending and receiving regular business correspondence. Shared addresses such as sales@, accounts@ or support@ are useful when more than one person needs visibility of incoming messages. They should not be set up as one password shared across the whole office, as that makes access difficult to manage and audit.
Write down the essentials before making changes: the domain registrar login, current email provider, website hosting details, names of users, existing email addresses and any old devices still in use. If you are moving from an older system, confirm how much email data must be retained and whether contacts, calendars and shared folders also need to move. This preparation matters because changing domain records without checking the current setup can interrupt website forms or existing email delivery.
Choose the right email platform for your team
For most small and medium-sized businesses, Microsoft 365 or Google Workspace are practical choices. Both provide hosted mailboxes, calendars, storage and collaboration tools, and both work across Windows PCs, Macs, iPhones and Android devices.
Microsoft 365 is usually a strong fit for businesses already using Outlook, Word and Excel, particularly where shared calendars, Teams and familiar desktop applications matter. Google Workspace may suit teams that prefer browser-based working and already use Google Drive. There is no single winner for every company. The best option depends on your current files, staff habits, required storage and budget.
Avoid choosing purely on the cheapest monthly price. A low-cost mailbox can become expensive if it lacks support, storage, security controls or reliable recovery options. Check that the plan includes business-grade administration, multi-factor authentication and enough storage for the people who receive large attachments or keep long correspondence histories.
Connect your domain and protect email delivery
Once the provider is chosen, verify that you own the domain and update its DNS records. DNS is the behind-the-scenes directory that tells other systems where to send your email. Your provider will supply the precise values, and these must be copied accurately.
The key records normally include:
- MX records, which direct incoming email to the correct provider.
- SPF records, which state which services are allowed to send email from your domain.
- DKIM records, which add a digital signature to outgoing messages.
- DMARC records, which tell receiving servers how to handle messages that fail security checks.
MX records get mail flowing, but SPF, DKIM and DMARC are just as important. Without them, legitimate invoices, quotes and customer replies are more likely to be marked as suspicious. They also make it harder for criminals to impersonate your business using a spoofed address.
Be careful if your domain already has email configured. Replacing records blindly can cut off the old system before the new one is ready. In a planned migration, new mailboxes are created first, existing mail is moved where required, DNS changes are made at an agreed time, and both incoming and outgoing delivery are checked afterwards. DNS updates can take time to spread, so allow for a short transition period rather than making changes immediately before a busy trading day.
Create users, shared inboxes and sensible access rules
Create a named account for each member of staff. Individual accounts make it easier to reset access, remove permissions when someone leaves and identify the source of a message if needed. Use each employee’s real name where appropriate, rather than generic logins that get passed around.
Shared mailboxes should be assigned to the people who need them, with permissions managed centrally. For example, the accounts team may need access to accounts@, while only a small group should see confidential director correspondence. This approach is safer than forwarding every message to everyone, and it keeps inboxes less cluttered.
Use strong, unique passwords and enable multi-factor authentication for every account, including administrators. Multi-factor authentication means a stolen password alone is not enough to access the mailbox. An authenticator app is usually more secure than relying only on text messages, although either is better than leaving accounts protected by a password alone.
Keep administrator accounts separate from ordinary day-to-day email accounts where possible. Admin access can create, delete and alter mailboxes across the company, so it deserves extra care. Store recovery details securely and make sure at least two trusted people can regain access if the main administrator is unavailable.
Set up Outlook, mobile phones and other devices correctly
After the cloud setup is complete, staff need reliable access on their devices. Modern Microsoft 365 and Google Workspace accounts often connect through the provider’s sign-in page, rather than by manually entering old-style POP or IMAP server details. This is usually the safest route because it supports multi-factor authentication and ongoing security policies.
On a Windows PC or Mac, install updates before adding the account. In Outlook, use the employee’s full business email address and complete the provider sign-in prompt. On Apple Mail, iPhone or Android, choose the relevant Microsoft Exchange, Google or work account option rather than a generic manual setup where available.
POP and IMAP can still have a place for specialist software, older systems or certain devices, but they involve trade-offs. POP may download messages to one device and can make folders and sent items difficult to keep consistent. IMAP synchronises mail folders but may not handle calendars and contacts as fully as an Exchange connection. Where possible, use the provider’s recommended method so email, calendars and contacts stay aligned across devices.
Do not forget former staff mobile phones, old laptops and home computers. Remove access promptly when a person changes role or leaves. If a mobile phone is lost, a managed business platform may allow the work account to be removed remotely without wiping personal photos and apps, depending on the device policy in place.
Move old mail without losing vital records
If staff have years of email in an old provider, local Outlook archive or personal inbox, decide what actually needs to move. Migrating everything can take longer and may carry across old clutter, but leaving essential customer records behind creates another problem.
A sensible approach is to move current mailboxes, active contacts and calendars first, then retain an accessible archive for older records. Check legal, tax and client retention requirements before deleting anything. Test one mailbox as a pilot before moving the whole team, especially where users have large folders, delegated access or several devices.
Tell staff exactly when the change will happen and what they need to do. A short instruction sheet covering the new sign-in process, multi-factor authentication and how to find shared inboxes prevents a flood of avoidable support calls on migration day.
Test the setup before relying on it
A mailbox is not ready simply because it can send one message. Test internally and externally, from both desktop and mobile devices. Send messages to common providers, reply back, check attachments and make sure calendar invitations arrive as expected.
Also check that website enquiry forms, scanners, accounting software, CCTV alerts and any other equipment that sends email still work. These systems are often overlooked when email settings change. They may need an approved sending method or an updated password, and some older devices need separate configuration for modern security requirements.
Watch the first few days closely. Look for delivery delays, messages in junk folders, repeated password prompts and missing shared mailbox permissions. Small issues are much quicker to fix before staff begin creating workarounds with personal accounts.
If you need the change handled without disrupting the working day, A2z Computer Solutions can help with Microsoft 365 email setup, device configuration, migrations and ongoing business IT support across London. The aim is straightforward: give every member of staff secure access to the email they need, while keeping customer communication moving.
A well-configured business mailbox is quiet when it is working properly. That is exactly the point: your team should be able to get on with serving customers, not spend the morning chasing missing messages or resetting passwords.