Hosting for email sending.
Where you can send mail
and what a server costs.

The first screen of the section sums up the hosting directory in four numbers. There are 13 providers here: 6 allow sending, 5 come with caveats, 2 block port 25. Next to them — how many plans the estimate can use, the cheapest server with three addresses among providers that allow sending, and how many problems need attention. If “Needs attention” is above zero, start with the feed below; the “Add a hoster” button on the right adds a new provider. Open this screen before working out an estimate or choosing a provider for a new server. Compare the cheapest server in the directory with your own purchase: here the purchase at Baltic Cloud is cheaper, so the estimate will use it first.

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• Hosters in the directory — 13: 6 allow sending, 5 with caveats, 2 block port 25.
• Plans with a price — 7 — how many the estimate can use; 3 providers have no plans.
• Node with 3 addresses, cheapest — 18 USDT — OVHcloud VPS-2; your purchase at Baltic Cloud is cheaper — 11 USDT.
• Needs attention — 1 problem, covering 3 providers.

If some servers have no provider set, a “Detect server hosters” button appears next to it: the Hub looks up the address owner in the IP address registry.

The feed under the header names gaps in the directory that could make the estimate use the wrong price. Here there is one line: Melbicom, HostSlim and InterServer have no plans and no purchase price of yours, so the estimate will skip them. The “Add a plan” button opens the plan window for the first of them right away. The feed also lists servers at a provider the directory does not know, disabled plans and plans without a price — each line has its own fix button. Check it before every specification calculation: until a provider has a plan or a purchase, its servers are priced in the estimate at someone else's price or at the 20 USDT reference.

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• No plan — Melbicom, HostSlim and InterServer — no plan and no purchase of yours.
• What the estimate will do — use another price or the 20 USDT a month reference.
• Add a plan — opens the plan window for the first of them.

The line disappears as soon as the problem is solved.

The main table of the section: one provider per row. It shows everything that matters when choosing hosting for email sending: is port 25 open, how the provider treats bulk email, who sets up reverse DNS and whether you can buy extra addresses. The “Where it is used” column shows how many of your servers sit with the provider and how many specifications include it. The “mailing not forbidden” checkbox hides providers that block port 25 or forbid bulk email — leaving the ones where a sending server will actually work. The “Plans” column tells you where an estimate can be worked out right away, and the “+1 of your own” label shows where you already have a purchase price.

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• Hoster — name, website and rating: the package one as a gray badge, yours in color; a double tick means it is in use.
• Port 25 and Bulk email — open, on request or blocked; friendly, by agreement, forbidden or unknown.
• Reverse DNS and extra addresses — self-service or by ticket; whether you can buy more addresses.
• Where it is used — the green badge shows your servers, the blue one specifications.
• Plans — how many are added; “+1 of your own” is your purchase.
• Checkboxes — “mailing not forbidden” and “I use it (10)”.

The directory is sorted by the package rating.

The expanded Nordhost row shows how your own data lives in the directory. Instead of directory plans, there is your purchase price — a “Sending node” for 10 USDT a month — and 6 specifications are already priced with it: the estimate uses a purchase first. Next to it — a comment about the provider and a private reminder about the payment date. One row tells you how much you really pay this provider and where that price is used. The button on the right leads to the specification builder — that is where the purchase price is changed. The note is a good place for arrangements with the provider that are easy to forget.

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• Comment — port 25 open from the start, PTR set in the panel, addresses bought one at a time.
• My note — renew the invoice before the 25th.
• Your purchase — “Sending node” — 2 vCPU · 4 GB · 40 GB NVMe, 10 USDT a month, extra address 2.50 USDT.
• In specifications — 6 — the estimate uses a purchase first.

The purchase price is changed in the specification builder — the button on the right leads there.

The expanded Contabo row is an example of a provider with a plan from the standard package. The VPS S plan costs 6 USDT a month, and the comment marks the data as approximate — check it against the provider's website. The plan is already chosen in one specification, so the delete button is gray: the Hub will not let you delete a price an estimate relies on. If the plan is no longer needed or is out of date, open it for editing and clear the “Count in the estimate” checkbox. The plan is already used for the MailerQ cluster database of the newsletter, so if the provider changes its price, recalculate that specification too.

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• VPS S plan — 4 vCPU · 8 GB · 100 GB NVMe, one address included, extra address 3.50 USDT, 6 USDT a month.
• In specifications — one — the MailerQ cluster database of the newsletter.
• Delete — the button is gray.

If an estimate depends on a plan, the Hub will not delete it and suggests switching it off — earlier calculations keep their price.

The provider card gathers in one form everything that matters for email hosting: name, website, locations and three policies — port 25, bulk email, reverse DNS. Below — identity check, a rating from 1 to 10, whether you can buy extra addresses, payment methods and a free-form comment. Fill in the card from the provider's support answers, and where there is no answer, leave “unknown”: that way no unverified promises end up in the directory. You open the card when adding a new provider or when support has answered your question about port 25 and PTR. Payment methods and the identity check tell you how exactly you will have to order a server.

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• Name, website, locations — Nordhost, nordhost.example.net, DE.
• Three policies — port 25, bulk email, reverse DNS.
• Identity check and rating — light; 8 out of 10.
• Extra addresses and payment — available; card, sepa.
• Comment — free text.

A new provider starts with every policy set to “unknown” — an honest “check this” beats a guess.

The new plan window describes a specific VPS for sending so that the estimate can price it. Enter the configuration — vCPU, memory, disk and its type, locations — how many addresses the price includes and what an extra one costs, plus the plan price in USDT per month. The “Count in the estimate” checkbox decides whether the plan goes into new calculations: a switched-off plan stays in the directory, but the estimate does not use it. Add a plan when a provider has a suitable VPS for sending and you want the specification builder to be able to choose it. Fill in the number of included addresses and the extra address price carefully: the server price is calculated with three addresses, as in the estimate.

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• Configuration — vCPU, memory, disk and its type, locations.
• Addresses — how many the price includes and the price of an extra one.
• Price — USDT per month.
• OS and note — available systems.
• Count in the estimate — a switched-off plan stays in the directory but is left out of the estimate.

Directory prices are in USDT per month.

The private note window is a place for your opinion of a provider that the rest of the Hub installation does not need to see. Here you set the “I use this hoster” mark, your own rating on top of the package rating, and free text — for example, about invoice due dates. The note and rating are visible only in your panel, and in the directory table your rating shows as a colored badge instead of a gray one. The directory itself stays shared. Your own rating helps you choose: the directory is sorted by the package rating, and yours appears next to it in color, so any gap between the package and your experience is easy to spot.

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• I use this hoster — a mark.
• Your rating — on top of the package rating.
• Text — a free-form note.

If your servers already sit with the provider, it counts as used even without the mark — the window tells you so.