Want to access your professional business email from your computer, smartphone, or tablet?
With Gestero, you can connect your business email account to popular email applications, including Microsoft Outlook, Mozilla Thunderbird, Apple Mail, and Gmail.
Whether you're working from your office, home, or on the go, your business emails can stay synchronized across multiple devices.
This guide explains how to configure your Gestero email account using IMAP and SMTP settings.
1. Information Required for Email Setup
Before connecting your business email account to an application, make sure you have the following information:
Email Address: yourname@yourcompany.com
Username: Your full email address
Password: Your email account password
Incoming Mail Server: mail.gestero.com
Outgoing Mail Server: mail.gestero.com
IMAP and SMTP Server Settings
Incoming Mail Server (IMAP)
Protocol: IMAP
Server Address: mail.gestero.com
Port: 993
Security: SSL/TLS
Username: Your full email address
Password: Your email account password
Outgoing Mail Server (SMTP)
Protocol: SMTP
Server Address: mail.gestero.com
Port: 465 (SSL/TLS) or 587 (STARTTLS)
Authentication: Required
Username: Your full email address
Password: Your email account password
Important: Always use your full email address as the username for both incoming and outgoing mail servers. Make sure the SMTP port matches the selected encryption method.
2. How to Set Up Business Email in Microsoft Outlook
Microsoft Outlook is one of the most popular email applications for business communication.
Follow these steps to connect your Gestero business email account:
Open Microsoft Outlook on your computer.
Click Add Account.
Enter your business email address.
Select manual configuration if required.
Choose IMAP as the account type.
Enter
mail.gestero.comas the incoming mail server.Set the incoming server port to 993 and select SSL/TLS.
Enter
mail.gestero.comas the outgoing SMTP server.Set the outgoing server port to 465 (SSL/TLS) or 587 (STARTTLS).
Enter your full email address and password.
Complete the setup and send a test email.
Your Gestero email account should now be ready to use in Outlook.
Note: The exact menu names and configuration screens may vary depending on your Outlook version.
3. How to Set Up Business Email in Mozilla Thunderbird
Mozilla Thunderbird is a free, open-source email application available for Windows, macOS, and Linux.
To configure your Gestero email account:
Open Mozilla Thunderbird.
Select the option to add a new email account.
Enter your name, business email address, and password.
Click Manual Configuration if the automatic settings are incorrect.
Set the incoming mail protocol to IMAP.
Enter
mail.gestero.comas the incoming server.Set the IMAP port to 993 with SSL/TLS encryption.
Enter
mail.gestero.comas the outgoing SMTP server.Use port 465 with SSL/TLS or 587 with STARTTLS.
Enter your full email address as the username for both servers.
Verify the settings and complete the configuration.
You can now send, receive, and manage your business emails through Thunderbird.
4. How to Set Up Business Email on iPhone and iPad
You can access your Gestero business email using the built-in Apple Mail application on your iPhone or iPad.
Follow these steps:
Open the Settings application.
Navigate to Apps > Mail > Mail Accounts. The location may vary depending on your iOS version.
Tap Add Account.
Select Other > Add Mail Account.
Enter your name, business email address, and password.
Select IMAP as the account type.
Enter
mail.gestero.comas the incoming mail server.Enter
mail.gestero.comas the outgoing mail server.Use your full email address and password for both servers.
Tap Save to complete the setup.
If required, open the advanced account settings and configure the following:
IMAP Port: 993
IMAP Security: SSL/TLS
SMTP Port: 465 or 587
SMTP Security: SSL/TLS for port 465 or STARTTLS for port 587
Your business emails should now be accessible through Apple Mail.
5. How to Set Up Business Email on Android
Android users can connect their Gestero business email accounts using the Gmail application or another compatible email client.
To configure your account using Gmail:
Open the Gmail application.
Tap your profile icon in the upper-right corner.
Select Add another account.
Choose Other as the account type.
Enter your business email address.
Select Personal (IMAP).
Enter your email account password.
Set the incoming server to
mail.gestero.com.Configure the incoming port as 993 with SSL/TLS.
Set the outgoing SMTP server to
mail.gestero.com.Configure port 465 with SSL/TLS or 587 with STARTTLS.
Enable SMTP authentication and use your full email address as the username.
Complete the setup.
You can now send and receive business emails directly from your Android device.
6. How to Set Up Business Email in Apple Mail on macOS
If you use a Mac, you can connect your Gestero business email account to Apple Mail.
Follow these steps:
Open the Apple Mail application.
Click Mail > Add Account.
Select Other Mail Account.
Enter your name, email address, and password.
Select IMAP if manual account configuration is required.
Enter
mail.gestero.comas the incoming mail server.Enter
mail.gestero.comas the outgoing mail server.Use your full email address as the username.
Complete the setup.
If necessary, open the account's server settings and configure IMAP port 993 and SMTP port 465 or 587 with the corresponding encryption method.
Your Gestero email account should now be available in Apple Mail.
7. Common Email Setup Problems and Solutions
I can receive emails but cannot send them.
If you can receive messages but cannot send emails, the problem is usually related to your outgoing SMTP configuration.
Check the following settings:
SMTP Server: mail.gestero.com
SMTP Port: 465 or 587
Authentication: Enabled
Username: Your full email address
Password: Your email account password
Make sure you use SSL/TLS with port 465 or STARTTLS with port 587.
Also verify that your internet connection or network firewall is not blocking the selected SMTP port.
My email password is not accepted.
If your email application repeatedly asks for your password:
Make sure your password is correct.
Use your full email address as the username.
Check for accidental spaces or typing errors.
Verify that your email account is active.
Reset your email password if necessary.
After changing your password, update it in every email application connected to your account.
I receive an SSL/TLS connection error.
SSL/TLS errors may occur when the server address, port, or encryption settings are incorrect.
Make sure:
The mail server is
mail.gestero.com.IMAP uses port 993 with SSL/TLS.
SMTP uses port 465 with SSL/TLS or port 587 with STARTTLS.
Your device's date and time are correct.
Do not ignore certificate warnings or disable encryption to bypass connection problems.
My emails are not syncing across devices.
If messages appear on one device but not another, check whether your account is configured using IMAP.
IMAP synchronizes your email messages with the mail server, allowing you to access the same mailbox from multiple devices.
If you previously configured your account using POP3, consider adding it again using IMAP.
My sent emails are going to spam.
If recipients frequently find your messages in their spam folders, check your domain's email authentication settings.
The most important records are:
SPF (Sender Policy Framework): Identifies which mail servers are authorized to send email for your domain.
DKIM (DomainKeys Identified Mail): Adds a digital signature to outgoing emails to help verify their authenticity.
DMARC (Domain-based Message Authentication, Reporting, and Conformance): Defines how receiving servers should handle messages that fail relevant authentication checks.
Proper SPF, DKIM, and DMARC configuration can improve email authentication and deliverability, although it does not guarantee that every message will reach the inbox.
8. Frequently Asked Questions
What is the difference between IMAP and SMTP?
IMAP and SMTP serve different purposes.
IMAP (Internet Message Access Protocol) allows you to access and synchronize incoming emails across multiple devices.
SMTP (Simple Mail Transfer Protocol) is responsible for sending outgoing emails.
Both protocols are typically required to send and receive emails using a third-party email application.
What is the difference between IMAP and POP3?
IMAP keeps your email messages synchronized with the mail server, making it suitable for users who access their email accounts from multiple devices.
POP3 is primarily designed to download email messages to a local device.
For modern business email usage, IMAP is generally recommended.
Can I use my business email on multiple devices?
Yes. You can configure the same Gestero business email account on your computer, smartphone, and tablet.
Using IMAP helps keep your mailbox synchronized across supported email applications.
What is the Gestero incoming mail server?
The Gestero incoming mail server address is:
mail.gestero.com
Use IMAP port 993 with SSL/TLS encryption.
What is the Gestero outgoing mail server?
The Gestero outgoing SMTP server address is:
mail.gestero.com
Use port 465 with SSL/TLS or port 587 with STARTTLS, depending on the enabled server configuration.
SMTP authentication is required.
Do I need special software to use my Gestero business email?
No. You can use compatible email applications that support standard IMAP and SMTP connections.
Popular options include:
Microsoft Outlook
Mozilla Thunderbird
Apple Mail
Gmail for Android
Other IMAP/SMTP-compatible email clients
Can I use my own domain name with Gestero email?
Gestero business email accounts can be configured with your company's domain name, allowing you to use professional addresses such as:
A domain-based email address helps establish a professional and consistent identity for your business.
9. Tips for Secure Business Email Usage
Keeping your business email account secure is essential for protecting company communications and sensitive information.
We recommend following these practices:
Use a strong password. Choose a unique password that is difficult to guess and avoid reusing passwords across different services.
Keep your email applications updated. Install updates regularly to benefit from security improvements and bug fixes.
Use encrypted connections. Always configure your email applications to use SSL/TLS or STARTTLS.
Be cautious with suspicious emails. Avoid opening unexpected attachments or clicking suspicious links.
Protect your devices. Use screen locks, device encryption, and other available security features.
Never share your email password. Each employee should use their own email account when individual access is required.
10. Manage Your Business Communications with Gestero
Professional email communication is an important part of running a successful business.
Using a business email address with your own domain helps you build credibility, maintain a consistent brand identity, and communicate professionally with customers and partners.