OhRelay
Apple Mail & Desktop Clients

Send from your domain in Apple Mail.

Desktop email clients like Apple Mail, Spark, and Thunderbird can use OhRelay as the outgoing SMTP server. Once configured, you keep receiving mail in your normal inbox and can send replies through OhRelay by selecting the gateway in the From field.

You only need to configure one gateway per working inbox. All your domain addresses route through the same sender.

Apple Mail on Mac

Adding OhRelay to Apple Mail

You'll add OhRelay as a custom outgoing SMTP server to your existing iCloud (or Gmail) account. Apple Mail doesn't support standalone SMTP-only accounts — it must be attached to an existing account.

1

Open Mail Settings → Accounts

In Apple Mail, go to Mail → Settings (macOS Ventura or later) or Mail → Preferences (older macOS). Click the Accounts tab. In the left column, select the account you use as your working inbox (e.g. iCloud).

2

Open Server Settings and edit the SMTP list

Click the Server Settings tab on the right. Find the Outgoing Mail Server (SMTP) dropdown, click it, and choose Edit SMTP Server List…

3

Add OhRelay as a new server

Click the + (plus) button. In the Server Settings tab, fill in:

  • Description: OhRelay
  • Server Name: smtp.ohrelay.com

Then switch to the Advanced tab and:

  • Uncheck "Automatically manage connection settings"
  • Port: 587
  • Use TLS/SSL: checked (STARTTLS)
  • Authentication: Password
  • User Name: your OhRelay SMTP username
  • Password: your OhRelay SMTP password

Click OK to save.

4

Set OhRelay as the outgoing server for this account

Back in Server Settings, use the Outgoing Mail Server (SMTP) dropdown to select OhRelay. Click Save. All outbound mail from this account will now go through OhRelay.

5

Select the Gateway Email when composing

When composing or replying, click the From field dropdown and select your Gateway Email from OhRelay shown in the dashboard. OhRelay will deliver the message with your correct domain sender address — recipients never see the gateway address.

✅ Tip: Apple Mail remembers the From address used in a thread, so once you've selected it for the first reply, subsequent replies in the same conversation use it automatically.

Other desktop clients

Works the same way in Spark, Thunderbird, and others

Any mail client that supports custom SMTP will work with OhRelay. The settings are always the same.

  • SMTP Server: smtp.ohrelay.com
  • Port: 587 (STARTTLS) or 465 (TLS)
  • Username: from your OhRelay dashboard
  • Password: from your OhRelay dashboard
  • From address: use the Gateway Email from your dashboard
vs Gmail

Same one-click action, same single gateway

Both Gmail and Apple Mail require you to select the gateway address from the From field when sending — this is required by email standards (DMARC/SPF) and platform security policies, not an OhRelay limitation.

The good news is the same either way: you only add one gateway address to your client. All your domain addresses — no matter how many — are handled through that single gateway.

Using Gmail instead?

We have a guide for that too.

Gmail works great with OhRelay — it just needs one extra setting.

Gmail setup guide Back to Quick Start