Email

Email is the workhorse channel. Senderz signs every message with your own DKIM key, routes it through more than one provider, and adds tracking, the unsubscribe link and the compliance headers at send time, so your templates stay clean.

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What makes an email send-able

Two things have to be true before Senderz will send from an address. Both are checked on the server, so neither can be skipped by editing the campaign.

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Verifying a sender address

Open Settings → Domains & senders (also reachable at /domains) and use the Sender addresses card. The card shows one of three states:

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Sender names

Sender names is a separate, reusable list of From names in the same place. Pick one per campaign or per automation step, or type a one-off name. Senderz checks the name as you type:

• Blocked and cannot be saved: line breaks and control characters, and the characters < > @ " [ ] and a backslash. These break the From header outright.
• Warned but allowed: punctuation like . , : ; ( ), repeated punctuation such as !!! or ***, emoji, names that look like a link or a domain, and names over 60 characters. These render inconsistently or attract spam filters.

The field accepts up to 100 characters.

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Limits

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Default sender

Default sender on the same screen sets the From name and address that new campaigns and new automation email steps start with. The email you pick must itself be a verified sender address. Apply to all messages stamps that address onto every existing email campaign that is a draft, scheduled or paused, and onto every email step of every draft, active or paused automation. Before you confirm, Senderz shows how many campaigns and automations will change.

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Reply-to

Each campaign can reply to the sender address or to a different address. The pre-send checklist blocks the send if you choose a different address and leave it empty or invalid.

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What Senderz adds to a marketing email

These are added at send time, per recipient, to marketing mail only. Transactional and test messages are covered further down.

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Open and click tracking

Tracking is added to marketing email only. Transactional messages and test sends are never tracked.

• Opens are counted by a 1x1 pixel added at the end of the message.
• Clicks are counted by rewriting each link so it passes through a Senderz redirect first, then lands on your original URL.

Only real http and https links are rewritten. Anchor links, mailto: and tel: links, and any URL that still contains an unresolved merge tag are left exactly as written. If the campaign has UTM tracking turned on, the UTM values are added to the destination URL at the same moment.

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Unsubscribe

Every marketing email gets both halves of the unsubscribe: the headers mailbox providers read, and a link a person can click.

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The one-click headers

Senderz adds List-Unsubscribe and List-Unsubscribe-Post with the one-click value. This is what makes Gmail and Yahoo show their own native unsubscribe button next to your From name, and it is a requirement for bulk senders on both. Senderz also adds a List-ID header derived from your sending domain, which is what lets Gmail group your mail. All three headers are covered by the DKIM signature, so a receiver can tell they were not added in transit.

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Placing the link yourself

You control where the in-body link goes. Senderz uses a placeholder token, %%UNSUBSCRIBE_URL%%, and swaps it for that recipient’s own preference-center link when the message is built. In the email builder you can insert it four ways:

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The fallback footer

If a marketing email is about to go out with no Senderz unsubscribe token anywhere in it, Senderz appends a small footer at the very bottom. It is right-to-left, centred, grey, and carries two lines:

1. Your From name, or the From address if no name is set.
2. The bilingual link הסרה מרשימת התפוצה · Unsubscribe.

The footer is deliberately plain. It exists so no marketing email can go out without a working opt-out, not to look good.

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Order of operations

Link rewriting for click tracking runs before the unsubscribe token is resolved, and the token is not a URL, so unsubscribe links are never turned into tracked links. A recipient clicking unsubscribe is never counted as a click.

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Copy-to BCC

Settings → Sending Settings → Copy an inbox on every campaign sends a hidden copy of each marketing campaign to an address you choose.

• It is a real envelope BCC, not a header. The primary recipient cannot see it.
• It applies to campaign marketing sends only. Automations, transactional mail and test sends are not copied.
• It never fires when the copy address is the same as the recipient, so a contact on your own list does not get two copies.
• The optional name is for your own reference. A BCC envelope carries no display name, so only the address is used.

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Transactional email

Order confirmations, receipts, shipping notices, password resets and one-time codes are transactional. There are two ways to send them.

• Through the Public API, with POST /public/messages/email.
• From an automation whose trigger step is switched to This is a transactional automation. Every message step in it inherits the setting. Only a workspace owner or admin can turn it on. See Automation triggers.

Transactional email skips:

• marketing consent, so it reaches contacts who never opted in to marketing,
• frequency caps,
• your own quiet hours and any campaign block window,
• the marketing deliverability hold, the active-contact limit and workspace suspension.

It also never carries tracking, an unsubscribe link or unsubscribe headers, and it is never copied to your BCC inbox. The sender rules are not relaxed. Transactional mail you send through the Public API, or from an automation marked as transactional, still has to come from a verified domain and a verified sender address, and that domain still has to be clear of the Spamhaus blocklist. Senderz can route transactional mail through relays that are not permitted to carry marketing. Which relay a message uses is managed for you.

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Plain text

Campaign and automation email is sent as HTML. Senderz does not currently build a plain-text alternative for you, and there is no plain-text editor in the builder. The Code pane and the Edit plain text action in the automation email step both open the HTML source, not a text version. If you send through the Public API you can supply your own text alongside html, and Senderz will send a proper multipart message with both.

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Testing an email

Open a template and use Send test in the preview pane. Two things behave differently in a test:

• The unsubscribe link is inert. Any unsubscribe token in the message is replaced with #, so clicking it does nothing. This is deliberate: a test must never unsubscribe anybody.
• Nothing is tracked. Test opens and clicks are not recorded, so a test cannot move your campaign numbers.

Test sends are de-duplicated for two minutes on the same recipient and content, so a double click on Send test delivers one email, not two.

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Send timing

On the campaign schedule step, Send mode offers three options for email. All three only change when a send runs. Every check below still runs at the moment the message actually goes out.

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Quiet hours

The Israeli legal quiet-hours and Shabbat block does not apply to marketing email. Email does honour two windows you set yourself:

• Settings → Sending Settings → Custom quiet hours, which applies to the whole workspace.
• Block sending window on the campaign schedule step, which applies to that campaign only.

Inside either window an email is held and retried when the window opens, not dropped. See Quiet hours and Shabbat.

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Frequency caps

Marketing email is capped per contact at 5 messages a day and 15 a week. A contact over either cap is skipped for that send. Transactional mail is not counted and is not capped. A recipient who chooses reduce frequency on your preference center is capped tighter than that from then on.

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Smart sending

Smart sending skips a contact in an automation when they were emailed too recently. It is switched on per automation message step, under Skip recently emailed profiles. Settings → Sending Settings → Smart sending window sets the two windows it measures against:

• Email campaign window counts how recently a campaign reached that contact. Default 16 hours.
• Email flow window counts how recently an automation reached them. Default 24 hours.

Each accepts 1 to 168 hours. A contact inside either window is skipped and moves straight on to the next step.

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Deliverability and failover

Senderz sends through an ordered list of email providers. If one starts failing, it is skipped and the next one is tried, and it stops being tried at all for a while so a bad provider does not slow every send behind it. One failure is treated differently. If the connection drops after the provider may already have accepted the message, Senderz stops. It does not retry and does not fail over, because either choice risks sending the same email twice. The recipient shows as Failed with Delivery status unknown, and you decide whether to resend.

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The Spamhaus blocklist gate

Senderz checks your sending domains against the Spamhaus domain blocklist. If a domain is listed, sends from it are refused with:

This sending domain is listed on the Spamhaus domain blocklist. Request delisting before sending from it.

The campaign wizard flags it on the pre-send checklist before you get that far. A domain flagged as a legitimate site that has been abused is a warning rather than a block, but delivery will suffer until it is resolved.

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The pre-send checklist

The review step of the campaign wizard runs a checklist before it lets you send. For email it blocks on a missing template, a missing audience, a missing subject, a missing From name, a From address that is missing or malformed, an unverified domain, an unverified sender address, a blocklisted domain, an invalid reply-to, and an unaccepted compliance declaration. An empty audience and a timing conflict are warnings you can send past. Two findings link straight to the fix: Verify sender address and Open domain settings both open the Domains and senders screen.

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Why an email was skipped or failed

Open a campaign and use Recipients to see the per-recipient outcome. Each row is one of Queued, Sent, Delivered, Bounced, Complaint, Failed, Suppressed or Skipped, with a reason.

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Templates

Email content is built from reusable blocks, from raw HTML, or from a gallery starter. See Templates and content.