Mailrith Guides
Email Sending Guides
Browse focused guides for the sending workflow and the concepts that matter: SPF, DKIM, DMARC, reputation, bounces, complaints, unsubscribe, tracking, and more.
Recommended reading order
Read the Guides in This Order
Start at the top and move section by section. The order goes from basic sending ideas, to setup, to authentication and deliverability, then subscribers, writing, sending, and troubleshooting.
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Setup and Permission
Authentication and Deliverability
- 1. Sender Domains and Email Authentication
- 2. From, Reply-To, and Return-Path
- 3. DNS, PTR, and Reverse DNS
- 4. Email Headers and Message Format
- 5. SPF
- 6. DKIM
- 7. DMARC
- 8. DMARC Alignment
- 9. TLS and Secure Sending
- 10. MTA-STS and TLS Reporting
- 11. ARC and Forwarded Email
- 12. Sender Reputation and Spam Rate
- 13. Dedicated and Shared Sending IPs
- 14. Sending Volume and Warmup
- 15. Blocklists and Link Reputation
- 16. Tracking Domains, Links, and UTMs
- 17. Inbox Placement, Promotions, and Spam Folders
- 18. One-Click Unsubscribe and Opt-Outs
- 19. Bounces
- 20. Spam Complaints
- 21. Complaint Feedback Loops and ARF
- 22. Suppression Lists and Subscriber Status
- 23. BIMI
Subscribers
Message
Send and Schedule
Learn and Fix
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Start Here
What Sending an Email Means
Mailrith prepares the campaign, your email delivery service sends the email, and inbox providers decide where the message lands.
Start Here
Email Types and Sender Separation
Marketing, transactional, operational, and personal email should not always use the same sender setup.
Start Here
Choose the Right Sending Method
Use broadcasts for one-time messages, sequences for planned follow-ups, and automations for behavior-based journeys.
Start Here
Plan Before You Write
A short plan keeps the email focused and prevents last-minute mistakes with subscribers, the offer, and timing.
Setup and Permission
Prepare the Sender Identity
Choose a sender name, sender email, reply-to address, and verified domain that match the trust you want subscribers to have in your email.
Setup and Permission
Keep Permission and Compliance Simple
Send to people who expect your email, identify yourself clearly, and make unsubscribing easy.
Setup and Permission
Protect List Quality
A smaller list of people who want your emails is better than a large list of people who ignore or reject your emails.
Setup and Permission
Email Delivery Services
An email delivery service sends your email, while Mailrith manages subscribers, campaigns, and follow-up.
Setup and Permission
Connect and Test an Email Delivery Connection
Create a Mailrith delivery connection, save the email delivery service credentials, assign the connection to the correct workspace, and send a test email.
Authentication and Deliverability
Sender Domains and Email Authentication
Your sender domain is what inbox providers learn to trust. Authentication proves that your email delivery service is allowed to send email for your domain.
Authentication and Deliverability
From, Reply-To, and Return-Path
An email can include several sender-related addresses. Each address has a separate role for delivery, authentication, or replies.
Authentication and Deliverability
DNS, PTR, and Reverse DNS
DNS records identify your domain. Reverse DNS helps inbox providers check that a sending IP address has a valid hostname.
Authentication and Deliverability
Email Headers and Message Format
Message headers, MIME structure, and basic formatting rules help inboxes read, display, and trust an email.
Authentication and Deliverability
SPF
SPF is a DNS record that lists the servers and services that may send email for your domain.
Authentication and Deliverability
DKIM
DKIM adds a signature to each email so inboxes can confirm that an approved domain accepted responsibility for the message.
Authentication and Deliverability
DMARC
DMARC tells inboxes how to handle a message that uses your domain but does not pass aligned SPF or DKIM checks.
Authentication and Deliverability
DMARC Alignment
DMARC alignment checks whether SPF or DKIM authentication uses the same domain family as the domain subscribers see in the From address.
Authentication and Deliverability
TLS and Secure Sending
TLS encrypts email while it moves between mail systems. Bulk senders are now expected to use TLS.
Authentication and Deliverability
MTA-STS and TLS Reporting
MTA-STS and TLS reporting are advanced controls for domains that need stronger protection for inbound email transport.
Authentication and Deliverability
ARC and Forwarded Email
ARC helps forwarding services preserve email authentication results when forwarding breaks SPF or changes a message.
Authentication and Deliverability
Sender Reputation and Spam Rate
Sender reputation is the trust inbox providers build from your authentication, sending history, volume, complaints, and subscriber behavior.
Authentication and Deliverability
Dedicated and Shared Sending IPs
Shared IPs let many senders use the same sending infrastructure. Dedicated IPs place more reputation responsibility on one sender.
Authentication and Deliverability
Sending Volume and Warmup
New senders should build trust gradually instead of sending a large campaign right away.
Authentication and Deliverability
Blocklists and Link Reputation
Inbox providers may distrust a sender because of the sending IP, domain, email delivery service account, or links in the email.
Authentication and Deliverability
Tracking Domains, Links, and UTMs
Open tracking, click tracking, tracking domains, and UTM fields affect reporting. They can also affect whether subscribers trust your email.
Authentication and Deliverability
Inbox Placement, Promotions, and Spam Folders
Delivery means the receiving system accepted the message. Placement means where the inbox shows the message.
Authentication and Deliverability
One-Click Unsubscribe and Opt-Outs
Marketing emails should make unsubscribing easy. Bulk sender rules also expect fast, simple unsubscribe handling.
Authentication and Deliverability
Bounces
A bounce means an email could not be delivered. Repeatedly sending to bad addresses can hurt future delivery.
Authentication and Deliverability
Spam Complaints
A complaint means a subscriber marked your email as spam. Inbox providers treat complaints as one of the strongest negative signals.
Authentication and Deliverability
Complaint Feedback Loops and ARF
Feedback loops tell senders when subscribers mark email as spam. These reports usually come from an email delivery service or mailbox provider.
Authentication and Deliverability
Suppression Lists and Subscriber Status
Suppression protects people who should not receive normal marketing email, including unsubscribed, bounced, or complained subscribers.
Authentication and Deliverability
BIMI
BIMI can show a brand logo in some inboxes, but logo display depends on strong authentication and inbox support.
Subscribers
Build the Subscriber List
Subscribers are people, tags describe subscribers, custom fields store subscriber details, and segments choose who matches the rules today.
Subscribers
Use Segments and Exclusions
Include the people who should receive the email, and exclude the people who should not receive it.
Message
Write the Subject and Preview Text
The subject gets attention. The preview text gives subscribers another reason to open the email.
Message
Write the Email Body
A good email has one main point, enough context, and one clear next step.
Message
Design for Phones First
Most subscribers scan emails quickly, so the email must be easy to read on a small screen.
Message
Use Personalization Carefully
Personalization works well when subscriber data is reliable. It feels awkward when subscriber data is missing or wrong.
Send and Schedule
Choose Delivery Settings
The delivery connection, reply-to address, tracking, UTM fields, and schedule should match the campaign purpose.
Send and Schedule
Test Like a Subscriber
Test an email like a Subscriber by opening, reading, and clicking it on desktop and mobile before you send.
Send and Schedule
Send Now or Schedule
Send a campaign immediately only after the email, subscriber list, send time, and approvals are final.
Learn and Fix
Read the Results
After a campaign sends, review delivery, opens, clicks, unsubscribes, bounces, and complaints together.
Learn and Fix
Handle Bounces, Complaints, and Unsubscribes
Delivery events help protect future sends by keeping risky addresses out of normal campaigns.
Learn and Fix
SMTP Errors, Deferrals, and Throttling
SMTP errors and email delivery service responses show whether a delivery problem is temporary, permanent, or caused by rate limits.
Learn and Fix
Troubleshooting Common Sending Problems
You can narrow down most sending issues by checking setup, subscribers, content, email delivery service, and subscriber status.
Learn and Fix
Improve the Next Email
Use each email send to learn one useful lesson and make the next campaign clearer.
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