# Send texts by email with an Email to SMS gateway > Create a gateway in Channels > Email to SMS. Email the gateway address with a mobile number in it, and Line texts the email body from your Line number. Source: https://useline.io/help/integrations/email-to-sms Section: Integrations and API Last updated: 2026-11-05 Roles: Owner, Admin An Email to SMS gateway turns an email into a text. Any system that sends email can use it, for example Outlook, a CRM, a booking system or a monitoring tool. The text leaves from your own Line number. ## Before you start - You need the **Owner** or **Admin** role to create and change a gateway. Members can see it. - You need a Line number that can send SMS. - Each text uses credits from your credit wallet, at the normal SMS rate. ## Create a gateway 1. In the main menu, select **Channels**. 2. Select **Email to SMS**. 3. Select **Create a gateway**. 4. Enter a **Name**, for example the name of the system that will send. 5. Select **Create**. The gateway card shows the gateway address. You are added as the first allowed sender. ## Send a text 1. Copy the gateway address from the card. 2. Put the mobile number after the `+`, with 44 in place of the first 0. For example: `name+447700900123@inbound.useline.io`. 3. Send an email to that address from an allowed sender. The email body becomes the text. Line removes quoted history. One email can text up to ten numbers. Put each gateway address in **To** or **Cc**. ### Put the number in the subject Some systems cannot change the address. Use the subject instead. 1. On the gateway card, in **Number in**, select **The subject**. 2. Send the email to the gateway address with no number in it. 3. Make the subject the mobile number and nothing else, for example `+447700900123`. Separate more numbers with commas. ## Choose who can send Line refuses mail from anyone who is not an allowed sender. An empty list blocks all mail. 1. On the gateway card, find **Allowed senders**. 2. Enter an address, such as `crm@yourcompany.co.uk`, or a whole domain, such as `@yourcompany.co.uk`. 3. Select **Add**. ## Choose the sending number In **Send from**, select the number that every text comes from. **Number in the workflow** lets the gateway workflow choose. Each gateway has a workflow named **Email to SMS**. Select **Edit workflow** to change it, for example to add a time rule or to text a fixed number. ## Use your own domain You can use a subdomain that you own, such as `sms.yourcompany.co.uk`. Senders then write to `447700900123@sms.yourcompany.co.uk`. 1. In **Your domain**, enter the subdomain. 2. Select **Add domain**. 3. Add the DNS records that the card shows to your domain. 4. Select **Check DNS** until the domain is verified. The Line address keeps working while you wait. ## Replies A reply from the recipient goes to the Inbox, in the SMS conversation with that person. You can also reply to a text by email. When a workflow forwards a text with a **Send an Email** step, reply to that email in your mail program. Line texts your reply to the customer from the number that they texted. Only a verified email destination or the sign-in email of a member can reply this way. ## Check what was sent **Recent texts** on the gateway card lists the last ten sends and refusals, with the reason for each refusal. Limits: 200 workflow texts an hour for the workspace, and 20 an hour for each recipient. ## Common problems **No text arrived and the log shows "Sender not allowed".** Add the sender address or its domain to **Allowed senders**. **The email arrived in the Inbox but no text went.** The address had no number, the subject was not only a number, the body was empty, or the wallet had too few credits. Check **Recent texts** for the reason. **My email reply did not send.** You replied from an address that is not a verified email destination or a member sign-in. The SMS conversation shows the note **Email reply not sent**. ## Related articles - [What you can connect to Line](https://useline.io/help/integrations/integrations-overview.md): Line connects to Google Calendar, Microsoft Calendar, your own HTTP and MCP tools, and the SMS API. Email to SMS works with any software that sends email. - [Set up what happens when a message comes in](https://useline.io/help/workflows/message-workflows.md): A message workflow starts with Message received. Filter by channel, endpoint, keywords or contact, then add an Agent step, an email or a text. - [Send and reply to text messages](https://useline.io/help/messaging/send-sms.md): Send an SMS from the Inbox with New message, or reply in the conversation. Texts leave from your Line number and cost credits per segment. - [How credits and the credit wallet work](https://useline.io/help/billing/credits-and-usage.md): Line is prepaid. Calls, texts, WhatsApp, extra email and AI replies use credits from your wallet. One credit is 1p. Automatic top-up refills it.