Getting Started

Adding DKIM and DMARC records for SMTP
Aliases
Catchall & Wildcard Aliases
Redirecting Aliases to Multiple Emails
Regexes in Aliases
Testing Your Aliases
Webhooks
Welcome to ImprovMX

Email Deliverability

Email Logs
Error Codes
Gmail Filters to Prevent Emails Marked As Spam
Spamhaus Filtering
Testing Gmail Forwarding

DNS Setup Guides

Cloudflare
Combining SPF Records
DigitalOcean
GSuite Legacy Setup
Generic DNS Configuration
Gmail's "send mail as"
GoDaddy
Google Workspace Split Delivery
Namecheap
Netlify
Squarespace
Vercel
White Labeling MX Records

Your Account

Billing Email Address
Delete My ImprovMX Account
Enabling/Disabling Password & 2FA
Moving Domains Across ImprovMX Accounts
Setting Privacy & Logging Levels
Strict MX Verification Setting
Updating Login Email
Updating credit card/payment details

SMTP

Apple Mail Incompatibility
Generic SMTP Setup
Gmail SMTP Setup
Microsoft Outlook Incompatibility
Mozilla Thunderbird SMTP Setup

Glossary

IMAP (Internet Message Access Protocol)
MX Records
POP3 (Post Office Protocol v3)
SMTP (Simple Mail Transfer Protocol)

Limits

API Rate Limits
Allowed Attachments
Sending/Receiving Limits
Supported SMTP Ciphers
Using Free Domains on ImprovMX

FAQ

Can I Whitelist an Email Address?
Can I turn off spam filtering?
Can I use ImprovMX SMTP for bulk mailing or mailing lists?
Can I use MX records from multiple forwarders?
Do you offer any cheaper plans?
Do you support ARC?
Do you support SRS?
Downloading an Email from ImprovMX Logs
Gmail SMTP FAQ
How do I view email headers?
How to setup a Gmail profile image for your email alias.
I'm getting a "Line too long" error
I'm getting a "Too Much Mail Data" error
ImprovMX IMAP, POP, and Incoming Protocols
No more MXS Domains
What does "Invalid DKIM signature" mean?
Why am I getting error: "5.1.9 Domain <domain> is not configured to send emails"?
Why are emails landing in spam?
Why does ImprovMX need SPF?

Supported Ciphers by Our SMTP Servers.

A list of encryption ciphers supported by our SMTP servers.

Your server can connect to ImprovMX servers by encrypting the connection using TLS or STARTTLS.

In order to be compatible, we support a broad set of ciphers and protocols, which range from SSLv3 to TLSv1.3.

Here's the full list:

  • SSLv3
    • ADH-AES256-SHA
    • ADH-CAMELLIA256-SHA
    • ADH-AES128-SHA
    • ADH-CAMELLIA128-SHA
    • SRP-DSS-AES-256-CBC-SHA
    • SRP-RSA-AES-256-CBC-SHA
    • SRP-AES-256-CBC-SHA
    • RSA-PSK-AES256-CBC-SHA
    • DHE-PSK-AES256-CBC-SHA
    • AES256-SHA
    • CAMELLIA256-SHA
    • PSK-AES256-CBC-SHA
    • SRP-DSS-AES-128-CBC-SHA
    • SRP-RSA-AES-128-CBC-SHA
    • SRP-AES-128-CBC-SHA
    • RSA-PSK-AES128-CBC-SHA
    • DHE-PSK-AES128-CBC-SHA
    • AES128-SHA
    • CAMELLIA128-SHA
    • PSK-AES128-CBC-SHA
  • TLSv1.0
    • ECDHE-ECDSA-AES256-SHA
    • ECDHE-RSA-AES256-SHA
    • AECDH-AES256-SHA
    • ECDHE-ECDSA-AES128-SHA
    • ECDHE-RSA-AES128-SHA
    • AECDH-AES128-SHA
    • ECDHE-PSK-AES256-CBC-SHA384
    • ECDHE-PSK-AES256-CBC-SHA
    • RSA-PSK-AES256-CBC-SHA384
    • DHE-PSK-AES256-CBC-SHA384
    • ECDHE-PSK-CAMELLIA256-SHA384
    • RSA-PSK-CAMELLIA256-SHA384
    • DHE-PSK-CAMELLIA256-SHA384
    • PSK-AES256-CBC-SHA384
    • PSK-CAMELLIA256-SHA384
    • ECDHE-PSK-AES128-CBC-SHA256
    • ECDHE-PSK-AES128-CBC-SHA
    • RSA-PSK-AES128-CBC-SHA256
    • DHE-PSK-AES128-CBC-SHA256
    • ECDHE-PSK-CAMELLIA128-SHA256
    • RSA-PSK-CAMELLIA128-SHA256
    • DHE-PSK-CAMELLIA128-SHA256
    • PSK-AES128-CBC-SHA256
    • PSK-CAMELLIA128-SHA256
  • TLSv1.2
    • ECDHE-ECDSA-AES256-GCM-SHA384
    • ECDHE-RSA-AES256-GCM-SHA384
    • ECDHE-ECDSA-CHACHA20-POLY1305
    • ECDHE-RSA-CHACHA20-POLY1305
    • ECDHE-ECDSA-AES256-CCM8
    • ECDHE-ECDSA-AES256-CCM
    • ECDHE-ECDSA-ARIA256-GCM-SHA384
    • ECDHE-ARIA256-GCM-SHA384
    • ADH-AES256-GCM-SHA384
    • ECDHE-ECDSA-AES128-GCM-SHA256
    • ECDHE-RSA-AES128-GCM-SHA256
    • ECDHE-ECDSA-AES128-CCM8
    • ECDHE-ECDSA-AES128-CCM
    • ECDHE-ECDSA-ARIA128-GCM-SHA256
    • ECDHE-ARIA128-GCM-SHA256
    • ADH-AES128-GCM-SHA256
    • ECDHE-ECDSA-AES256-SHA384
    • ECDHE-RSA-AES256-SHA384
    • ECDHE-ECDSA-CAMELLIA256-SHA384
    • ECDHE-RSA-CAMELLIA256-SHA384
    • ADH-AES256-SHA256
    • ADH-CAMELLIA256-SHA256
    • ECDHE-ECDSA-AES128-SHA256
    • ECDHE-RSA-AES128-SHA256
    • ECDHE-ECDSA-CAMELLIA128-SHA256
    • ECDHE-RSA-CAMELLIA128-SHA256
    • ADH-AES128-SHA256
    • ADH-CAMELLIA128-SHA256
    • RSA-PSK-AES256-GCM-SHA384
    • DHE-PSK-AES256-GCM-SHA384
    • RSA-PSK-CHACHA20-POLY1305
    • DHE-PSK-CHACHA20-POLY1305
    • ECDHE-PSK-CHACHA20-POLY1305
    • DHE-PSK-AES256-CCM8
    • DHE-PSK-AES256-CCM
    • RSA-PSK-ARIA256-GCM-SHA384
    • DHE-PSK-ARIA256-GCM-SHA384
    • AES256-GCM-SHA384
    • AES256-CCM8
    • AES256-CCM
    • ARIA256-GCM-SHA384
    • PSK-AES256-GCM-SHA384
    • PSK-CHACHA20-POLY1305
    • PSK-AES256-CCM8
    • PSK-AES256-CCM
    • PSK-ARIA256-GCM-SHA384
    • RSA-PSK-AES128-GCM-SHA256
    • DHE-PSK-AES128-GCM-SHA256
    • DHE-PSK-AES128-CCM8
    • DHE-PSK-AES128-CCM
    • RSA-PSK-ARIA128-GCM-SHA256
    • DHE-PSK-ARIA128-GCM-SHA256
    • AES128-GCM-SHA256
    • AES128-CCM8
    • AES128-CCM
    • ARIA128-GCM-SHA256
    • PSK-AES128-GCM-SHA256
    • PSK-AES128-CCM8
    • PSK-AES128-CCM
    • PSK-ARIA128-GCM-SHA256
    • AES256-SHA256
    • CAMELLIA256-SHA256
    • AES128-SHA256
    • CAMELLIA128-SHA256
  • TLSv1.3
    • TLS_AES_256_GCM_SHA384
    • TLS_CHACHA20_POLY1305_SHA256
    • TLS_AES_128_GCM_SHA256

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Questions? We’re always here to help.

We pride ourselves on offering incredibly reactive support, free of charge. Premium users get priority, but we answer everyone.

Request support

Still unclear? Watch a step-by-step video

Andy, a happy user from ImprovMX, has recorded a step-by-step video to explain how to set up your business email alias.

Read our onboarding guides