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SMTP Zen Email Forwarding

What SMTP Zen Email Forwarding is
SMTP Zen Email Forwarding routes mail sent to custom-domain addresses into inboxes you already use, so every address does not need its own mailbox. You can create named forwarding addresses, set catch-all rules, and manage forwarding across multiple domains. Forwarding covers inbound delivery only; it does not provide an inbox or authenticated outbound SMTP, so sending as the custom domain requires a hosted mailbox.
To configure it, add a domain, follow the displayed DNS instructions, create forwarding rules, and test receipt. SMTP Zen documents SMTP, IMAP, and POP settings, along with setup guidance for iOS and Android mail apps. Developers receive SMTP examples for Node.js, Python, PHP, Ruby, and Go, using port 465 with implicit TLS or port 587 with STARTTLS. Hosted mailbox plans include Crossbox webmail with unified inboxes, search, keyboard shortcuts, calendar, and contacts. Hosting plans state that SPF, DKIM, and DMARC are enforced, while the service describes TLS-encrypted connections. Plans start at $1.20 a month, and most plans include a 2-day free trial; custom plans may be excluded.
Who it suits
SMTP Zen fits developers sending application email, small teams, freelancers managing client domains, and domain investors. It is suited to routing several custom-domain addresses into existing inboxes, with hosted mailboxes available when outbound sending is needed.
What it does well
- Supports named aliases and catch-all forwarding
- Rules can cover multiple domains
- Documents SMTP, IMAP, and POP settings
- Examples for Node.js, Python, PHP, Ruby, and Go
- Hosted plans include Crossbox webmail
- SPF, DKIM, and DMARC enforced on hosting plans
What to know first
- Forwarding alone does not provide an inbox or outbound SMTP
- No free plan is available
- Most trials last only two days
- Service prohibits cold outreach and mass marketing blasts
Limits
The Roll your own plan costs $1.20 a month and includes one mailbox, one forwarder or alias, and a 2GB base disk quota. Most plans include a 2-day free trial, while custom plans may be excluded; most accounts can send about 400 outbound emails per mailbox per hour, including aliases.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Pro SMTP | 20 mailboxes · 10 email forwarders/aliases · 20GB base disk quota · unlimited domains and bandwidth | $11.99 a month |
| Roll your own | 1 mailbox · 1 email forwarder/alias · 2GB base disk quota · unlimited domains and bandwidth · fully customizable | $1.20 a month |
| Starter SMTP | 5 mailboxes · 10 email forwarders/aliases · 5GB base disk quota · unlimited domains and bandwidth | $2.99 a month |
| Freelancer SMTP | 10 mailboxes · 10 email forwarders/aliases · 10GB base disk quota · unlimited domains and bandwidth | $5.99 a month |
As smtpzen.com lists them, read 7 Oct 2026. The maker's own page has the final word.
Getting started
- Open the SMTP Zen email-forwarding service
- Add your custom domain
- Follow the displayed DNS instructions
- Create named forwarding addresses or catch-all rules
- Test that messages arrive in the destination inbox
- Choose a hosted mailbox plan if you need to send as the custom domain
Verdict
Choose SMTP Zen when you need custom-domain forwarding into existing inboxes, or mailbox hosting with documented mail-client and developer connections. Look elsewhere if you require forwarding to include outbound sending automatically or if your use case involves cold or mass marketing email.
Questions
What is the starting price?
The Roll your own plan is $1.20 a month. It includes one mailbox, one email forwarder or alias, 2GB base disk quota, unlimited domains, and unlimited bandwidth.
Is there a free plan?
No. The pricing model is paid, and most plans include a 2-day free trial.
Can forwarding send replies?
Forwarding handles inbound routing and does not provide authenticated outbound SMTP. A hosted mailbox is needed to send as the custom domain.
Which platforms and mail settings are supported?
SMTP Zen documents setup for iOS and Android mail apps and lists SMTP, IMAP, and POP connection settings.
Does it support catch-all addresses?
Yes. It supports catch-all rules as well as named forwarding addresses, with rules managed across multiple domains.
What sending restrictions apply?
SMTP Zen says it is not for cold outreach or mass marketing blasts and disallows sending to scraped, rented, or purchased lists.
Facts from SMTP Zen Email Forwarding's own pages
- Developer connections
- The maker provides SMTP examples for Node.js, Python, PHP, Ruby, and Go, using port 465 with implicit TLS or port 587 with STARTTLS. · docs.smtpzen.com, 7 Oct 2026
- Email authentication
- The email hosting plans state that SPF, DKIM, and DMARC are enforced, and the service describes TLS-encrypted connections. · smtpzen.com, 7 Oct 2026
- Email clients
- SMTP Zen documents setup for iOS and Android mail apps and lists SMTP, IMAP, and POP connection settings. · docs.smtpzen.com, 7 Oct 2026
- Included webmail
- SMTP Zen says its hosted mailbox service includes Crossbox webmail with unified inboxes, search, keyboard shortcuts, calendar, and contacts. · smtpzen.com, 7 Oct 2026
- Intended users
- The maker identifies developers sending app emails, small teams, freelancers managing client domains, and domain investors as intended users. · smtpzen.com, 7 Oct 2026
- Mailbox distinction
- Forwarding handles inbound routing and does not provide an inbox or authenticated outbound SMTP; a hosted mailbox is needed to send as the custom domain. · smtpzen.com, 7 Oct 2026
- Routing
- It supports named forwarding addresses and catch-all rules, with forwarding rules managed across multiple domains. · smtpzen.com, 7 Oct 2026
- Sending limit
- The site says most accounts can send about 400 outbound emails per mailbox per hour, including aliases. · smtpzen.com, 7 Oct 2026
- Service
- The forwarding service routes messages for custom domain addresses to inboxes you already use, without a separate mailbox for each address. · smtpzen.com, 7 Oct 2026
- Setup
- Setup consists of adding a domain, following the displayed DNS instructions, creating forwarding rules, and testing receipt. · smtpzen.com, 7 Oct 2026
- Trial
- Most plans include a 2-day free trial, while custom plans may be excluded. · smtpzen.com, 7 Oct 2026
- Use restrictions
- SMTP Zen says it is not for cold outreach or mass marketing blasts and disallows sending to scraped, rented, or purchased lists. · smtpzen.com, 7 Oct 2026
Where SMTP Zen Email Forwarding stands on Freedom251
- Email Forwarding Services#18 of 25
