alenazaharovaux/share/newsletter-publishing

## Newsletter strategy document
 
### Core identity
-**Name**:
-**Tagline** (one line):
-**What readers get**: [specific value proposition]
-**Frequency**: [ ] Daily [ ] Weekly [ ] Bi-weekly [ ] Monthly
 
### Target audience
-Primary reader:
-What they care about:
-Why they'll subscribe:
-What they'll do with this info:
 
### Content pillars
1.[Core topic 1] - [how often]
2.[Core topic 2] - [how often]
3.[Recurring feature] - [how often]
 
### Voice and tone
-Formal ↔ Conversational: [1-5]
-Serious ↔ Light: [1-5]
-Reported ↔ Personal: [1-5]
 
### Success metrics (first 6 months)
-Subscriber goal:
-Target open rate:
-Target click rate:

## [Newsletter Name] - Issue #[XX]
**Date**: [Date]
**Subject line**: [Subject]
**Preview text**: [First 50-90 characters readers see]
 
---
 
### Opening hook
[2-3 sentences that make readers want to keep reading]
 
### Main story
[Your primary content - 300-600 words for most newsletters]
 
### Secondary items (if applicable)
-**Quick hit 1**: [Brief item with link]
-**Quick hit 2**: [Brief item with link]
 
### Recurring section
[Weekly column, data point, recommendation, etc.]
 
### Sign-off
[Personal note, call to action, or preview of next issue]
 
---
 
**Unsubscribe** | **Preferences** | **Forward to a friend**

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>{{newsletter_name}}</title>
  <style>
    /* Reset styles for email clients */
    body { margin: 0; padding: 0; width: 100%; }
    table { border-collapse: collapse; }
    img { border: 0; display: block; }
 
    /* Responsive container */
    .container {
      max-width: 600px;
      margin: 0 auto;
      font-family: Georgia, serif;
      font-size: 18px;
      line-height: 1.6;
      color: #333;
    }
 
    /* Dark mode support */
    @media (prefers-color-scheme: dark) {
      .container { background-color: #1a1a1a; color: #e0e0e0; }
      a { color: #6db3f2; }
    }
 
    /* Mobile styles */
    @media only screen and (max-width: 480px) {
      .container { padding: 15px !important; }
      h1 { font-size: 24px !important; }
    }
  </style>
</head>
<body>
  <table role="presentation" width="100%">
    <tr>
      <td align="center" style="padding: 20px;">
        <div class="container">
          <!-- Header -->
          <table width="100%">
            <tr>
              <td style="padding-bottom: 20px; border-bottom: 2px solid #333;">
                <h1 style="margin: 0;">{{newsletter_name}}</h1>
                <p style="margin: 5px 0 0; color: #666;">{{issue_date}}</p>
              </td>
            </tr>
          </table>
 
          <!-- Content -->
          <table width="100%">
            <tr>
              <td style="padding: 30px 0;">
                {{content}}
              </td>
            </tr>
          </table>
 
          <!-- Footer -->
          <table width="100%">
            <tr>
              <td style="padding-top: 20px; border-top: 1px solid #ddd; font-size: 14px; color: #666;">
                <p>You're receiving this because you subscribed to {{newsletter_name}}.</p>
                <p>
                  <a href="{{unsubscribe_url}}">Unsubscribe</a> |
                  <a href="{{preferences_url}}">Update preferences</a>
                </p>
              </td>
            </tr>
          </table>
        </div>
      </td>
    </tr>
  </table>
</body>
</html>

from dataclasses import dataclass, field
from datetime import datetime
from typing import List, Dict, Optional
from enum import Enum
import hashlib
class SubscriberStatus(Enum):
    ACTIVE = "active"
    UNSUBSCRIBED = "unsubscribed"
    BOUNCED = "bounced"
    COMPLAINED = "complained"
@dataclass
class Subscriber:
    email: str
    name: Optional[str] = None
    subscribed_at: datetime = field(default_factory=datetime.now)
    status: SubscriberStatus = SubscriberStatus.ACTIVE
    tags: List[str] = field(default_factory=list)
    custom_fields: Dict = field(default_factory=dict)
    @property
    def hash_id(self) -> str:
        """Generate unique ID for unsubscribe links."""
        return hashlib.md5(self.email.encode()).hexdigest()[:12]
@dataclass
class NewsletterIssue:
    subject: str
    preview_text: str
    html_content: str
    plain_text: str
    scheduled_at: Optional[datetime] = None
    sent_at: Optional[datetime] = None
    issue_number: int = 0
    # Metrics
    sent_count: int = 0
    delivered_count: int = 0
    opened_count: int = 0
    clicked_count: int = 0
    bounced_count: int = 0
    unsubscribed_count: int = 0
    @property
    def open_rate(self) -> float:
        if self.delivered_count == 0:
            return 0.0
        return (self.opened_count / self.delivered_count) * 100
    @property
    def click_rate(self) -> float:
        if self.delivered_count == 0:
            return 0.0
        return (self.clicked_count / self.delivered_count) * 100
class NewsletterManager:
    """Core newsletter operations."""
    def __init__(self, name: str):
        self.name = name
        self.subscribers: List[Subscriber] = []
        self.issues: List[NewsletterIssue] = []
    def add_subscriber(self, email: str, name: str = None,
                       tags: List[str] = None) -> Subscriber:
        """Add new subscriber with double opt-in pending."""
        sub = Subscriber(
            email=email.lower().strip(),
            name=name,
            tags=tags or []
        )
        self.subscribers.append(sub)
        return sub
    def segment_subscribers(self, tags: List[str] = None,
                           min_engagement: float = None) -> List[Subscriber]:
        """Get subscribers matching criteria."""
        active = [s for s in self.subscribers
                  if s.status == SubscriberStatus.ACTIVE]
        if tags:
            active = [s for s in active
                     if any(t in s.tags for t in tags)]
        return active
    def calculate_engagement_score(self, subscriber: Subscriber) -> float:
        """Score subscriber engagement 0-100."""
        # Implementation would track opens/clicks per subscriber
        return 50.0  # Placeholder

from datetime import datetime, timedelta
def clean_subscriber_list(manager: NewsletterManager,
                         inactive_threshold_days: int = 180) -> dict:
    """Identify and handle inactive subscribers."""
    cutoff = datetime.now() - timedelta(days=inactive_threshold_days)
    results = {
        'total': len(manager.subscribers),
        'active': 0,
        'inactive': [],
        'bounced': [],
        'unsubscribed': []
    }
    for sub in manager.subscribers:
        if sub.status == SubscriberStatus.BOUNCED:
            results['bounced'].append(sub.email)
        elif sub.status == SubscriberStatus.UNSUBSCRIBED:
            results['unsubscribed'].append(sub.email)
        elif sub.status == SubscriberStatus.ACTIVE:
            # Check last engagement
            engagement = manager.calculate_engagement_score(sub)
            if engagement < 10:  # Very low engagement
                results['inactive'].append(sub.email)
            else:
                results['active'] += 1
    return results
def run_reengagement_campaign(inactive_subscribers: List[str]) -> None:
    """Send win-back campaign to inactive subscribers."""
    # Send "We miss you" campaign
    # If no engagement after 2 attempts, mark for removal
    pass

## Recommended segments
 
### By engagement
-**VIPs**: Open rate > 80%, always click
-**Engaged**: Open rate 40-80%
-**Casual**: Open rate 10-40%
-**At-risk**: Haven't opened in 90 days
-**Inactive**: Haven't opened in 180 days
 
### By interest (tag-based)
-Topic preferences from signup
-Content they've clicked
-Surveys/polls they've answered
 
### By source
-Organic (website signup)
-Referral (forwarded by friend)
-Social media
-Paywall/registration wall

## Subject line formulas that work
 
### For news/journalism
-**Breaking format**: "Breaking: [Concise news]"
-**Numbers**: "[X] things we learned about [topic]"
-**Question**: "Why did [entity] do [thing]?"
-**Direct**: "[Topic]: What you need to know"
 
### For analysis/opinion
-**Take**: "The real story behind [event]"
-**Contrarian**: "Why everyone is wrong about [topic]"
-**Insider**: "What [industry] insiders know about [topic]"
 
### What to avoid
-ALL CAPS
-Excessive punctuation!!!
-Clickbait that doesn't deliver
-Spam trigger words (FREE, URGENT, ACT NOW)
-Misleading preview text

import random
from typing import List, Tuple
def ab_test_subject_lines(subscribers: List[Subscriber],
                         subject_a: str,
                         subject_b: str,
                         test_percentage: float = 0.2) -> dict:
    """
    Test two subject lines on subset before full send.
    """
    test_size = int(len(subscribers) * test_percentage)
    test_group = random.sample(subscribers, test_size)
    # Split test group
    half = len(test_group) // 2
    group_a = test_group[:half]
    group_b = test_group[half:]
    remaining = [s for s in subscribers if s not in test_group]
    return {
        'group_a': {
            'subject': subject_a,
            'subscribers': group_a,
            'size': len(group_a)
        },
        'group_b': {
            'subject': subject_b,
            'subscribers': group_b,
            'size': len(group_b)
        },
        'remaining': {
            'subscribers': remaining,
            'size': len(remaining),
            'note': 'Send winner to this group after test period'
        },
        'test_duration_hours': 4
    }

## DNS records for deliverability
 
### SPF record

 
### DKIM
- Generate keys through your ESP
- Add TXT record with public key
- Verify signature is applied to outgoing mail
 
### DMARC

 
### Checklist before sending
- [ ] SPF, DKIM, DMARC configured
- [ ] Sending domain warmed up
- [ ] List is clean (no hard bounces)
- [ ] Unsubscribe link works
- [ ] Physical address in footer (CAN-SPAM)
- [ ] Test email received in inbox (not spam)

## Before you send
 
### Content checks
-[ ] No spam trigger words
-[ ] Text-to-image ratio good (mostly text)
-[ ] All links are to reputable domains
-[ ] No URL shorteners (use full links)
-[ ] Plain text version included
 
### Technical checks
-[ ] From address matches sending domain
-[ ] Reply-to address is monitored
-[ ] Preheader text is set
-[ ] Images have alt text
-[ ] Links are not broken

from dataclasses import dataclass
@dataclass
class NewsletterAnalytics:
    """Track newsletter performance over time."""
    issue: NewsletterIssue