Recommended Sending Limits
Limit Type | Recommendation | Rationale |
Daily limit | ~30 emails per day per email address | Keeps your domain reputation healthy and stays well below provider hard caps. |
Hourly limit | 5-10 emails per hour | Mimics natural human sending behavior. Enginy automatically throttles sends over time. |
Absolute upper limit | Never exceed 80 emails/day from one address | Even for well-warmed domains, exceeding this risks serious reputation damage. |
Enginy automatically paces your campaign and enforces the configured sending limits. If you reach the daily cap, Enginy pauses sending for the day and resumes the next day.
Tips: To reach higher total volumes, connect multiple sender addresses or domains rather than increasing the send rate of a single inbox.
Consequences of Exceeding Limits
Account suspension or rate limiting — Your email provider may temporarily block outgoing messages.
Damage to domain reputation — Unusual sending spikes get flagged by spam filters, causing more future emails to land in spam.
Increased spam reports and bounces — High-volume sends to cold contacts yield more bounces and complaints, further hurting deliverability.
Adjusting Sending Limits
Enginy allows you to adjust daily and hourly send caps under your email identity settings. You might lower the volume temporarily if you notice deliverability issues, or raise it slightly after a successful warm-up period.
Warning: Stick to the recommended values unless you have a specific reason to change them. Only experienced senders with properly warmed domains should consider higher limits, and even then with caution.
Using Multiple Email Addresses
Connecting multiple email addresses to Enginy is a best practice for scaling outreach safely:
Distributes the sending load — Each inbox only sends a portion of the total emails, keeping every account within safe limits.
Minimizes spam/blacklist risk — If one address hits a deliverability issue, others continue operating normally.
Maintains consistent performance — Each email account builds its own reputation independently.
Increases combined capacity — For example, 3 inboxes at 30 emails/day each give you 90 emails/day total while each stays within the safe zone.
You can configure Enginy to rotate between connected email accounts when sending campaign emails (Shuffle), or assign different campaigns to different addresses.
Email Deliverability Best Practices
Set up SPF, DKIM, and DMARC — Make sure your domain's DNS is correctly configured. Use free online tools to verify your DNS health and email deliverability score.
Warm up your domain — Send a small volume of emails for 2--3 weeks before launching campaigns (see Email Warm-up).
Limit daily volume per domain — Stick to ~30 emails/day per domain and never exceed 80.
Vary your messages — Do not send identical content to everyone. Use personalization and AI Variables to create unique messages for each prospect.
Keep it simple — no attachments — Enginy does not allow attaching files directly (attachments are a common spam trigger). Instead, share files by adding a link (Google Drive, Dropbox, OneDrive, etc.).
Use multiple domains — Spread outreach across several domains (e.g., tourcompany.com, yourcompany.io, yourcompany.es) and rotate them across campaigns.
How to add a file link in your email:
Open the email step and go to the message editor.
Click the link attachment icon (tooltip: “Attach file via link”).
In Insert file via link, upload the file:
Drag & drop it into the box, or click browse to select it.
Supported formats: PDF, DOC, XLS, PPT, TXT, CSV, ZIP (max 2MB).
(Optional) Keep Open in new tab enabled if you want recipients to open the file in a new tab.
Click Add file.
Edit the Label text and confirm Add file. Enginy will upload the file and insert a shareable link into your email body.
Important: By keeping your emails lightweight, personalized, and link-based instead of attachment-heavy, you protect your domain reputation and dramatically increase your chances of landing in the inbox.