E-mail

Create professional e-mail mailboxes on your domain with web interface and full IMAP/POP3 support.

Overview

Creating E-mail Domain

Step 1 — Open E-mail Section

1. Log in to CoreSynth Dashboard 
2. Go to Web Hosting
3. Select your hosting package
4. Click E-mail in sidebar

Step 2 — Create E-mail Domain

Before creating a mailbox, add an e-mail domain:

1. Click Create E-mail Domain
2. Select domain from list
3. Click Create

Note: E-mail domain can only be created for domains added to hosting.

Creating E-mail Mailbox

Step 1 — New Mailbox

1. In E-mail section click Create Account
2. Fill in:

3. Click Create

Step 2 — Login Credentials

After creation you receive:

Mail Client Setup

Outlook / Thunderbird

Note: IMAP/POP3 requires password authentication.

Outlook Setup

1. Open File → Add Account
2. Select Manual Setup
3. Enter:

IMAP Server: webhosting.coresynth.io
Port: 993
Encryption: SSL/TLS

SMTP Server: webhosting.coresynth.io
Port: 465
Encryption: SSL/TLS

Username: [email protected]
Password: [your password]

4. Click Next and complete

Thunderbird Setup

1. Open Tools → Account Settings
2. Click Add Mail Account
3. Enter e-mail and password
4. Click Manual Config
5. Set IMAP/SMTP according to table above
6. Click Done

Webmail

Access Webmail

1. Open webmail.coresynth.io 
2. Enter e-mail and password
3. Click Login

Webmail Features

Roundcube Webmail offers:

• Send and receive e-mails
• Folders (Inbox, Sent, Trash)
• Filters and rules
• Address book
• Signature
• Auto-reply

Auto-reply

1. In Webmail go to Settings
2. Click Auto-reply
3. Check Enable auto-reply
4. Enter message text
5. Set validity period
6. Click Save

DKIM

What is DKIM?

DKIM (DomainKeys Identified Mail) is technology for verifying e-mail authenticity. Helps deliver e-mails to inbox instead of SPAM.

Enabling DKIM

1. In E-mail section click DKIM
2. Select e-mail domain
3. Click Enable DKIM
4. Add DNS record:

5. Wait for DNS propagation (up to 24 hours)

Regenerating DKIM

1. In DKIM section click Regenerate
2. Update DNS record with new key
3. Wait for DNS propagation

Managing Mailboxes

Suspending Mailbox

1. In mailbox list click Suspend
2. Mailbox will not receive new e-mails
3. Existing e-mails remain intact

Changing Password

1. In mailbox list click Change Password
2. Enter new password
3. Click Save

Deleting Mailbox

Warning: Deleting mailbox is irreversible. All e-mails will be permanently deleted.

1. In mailbox list click Delete
2. Confirm deletion

Limits

Mailbox Count

Mailbox Size

Default limit is set by package. To increase:

1. Click on mailbox
2. Edit Quota
3. Click Save

Troubleshooting

E-mails Not Arriving

Cause: Wrong MX record or DNS propagation.

Solution:

1. Check MX record:

   nslookup -type=MX your-domain.com

2. MX should point to webhosting.coresynth.io
3. Wait for DNS propagation (up to 48 hours)

E-mails Going to SPAM

Cause: Missing SPF or DKIM record.

Solution:

1. Add SPF record:

   TXT @ → v=spf1 a mx ~all

2. Enable DKIM in panel
3. Add DKIM DNS record
4. Consider DMARC record

Cannot Login

Cause: Wrong password or suspended mailbox.

Solution:

1. Check if mailbox is active
2. Try resetting password
3. Check you’re using correct format:
   • Username: [email protected] (full e-mail)
   • Server: webhosting.coresynth.io

Webmail Not Working

Cause: Server maintenance or overload.

Solution:

1. Try refreshing page
2. Check server status at status.coresynth.io
3. Try mail client (Outlook, Thunderbird)

Security Recommendations

• Use strong passwords (min 12 characters)
• Change passwords regularly
• Enable DKIM for each e-mail domain
• Set SPF record in DNS
• Check SPAM folder regularly

Next Steps

• DNS Settings — MX, SPF, DKIM records
• Web Hosting — Hosting overview
• Domains — Domain management

Need help? Open a support ticket  or ask Alex in your dashboard.