MailerQ vs SMTPeter (2026): which should you pick?

Pick MailerQ if

• Fits if you send millions of emails and run your own sending servers
• Makes sense if you want a console to manage IP warm-up and per-provider limits

Look elsewhere if

• Skip it if you want a hosted service, as it's software you install and run
• Pricey if you're small: €10,000 up front and €2,000 a year after
• Tight if you send a lot on Regular, which stops at 100K emails an hour and 10 domains
• Watch out: the trial length isn't stated, and the pages don't name supported operating systems

Pick SMTPeter if

• Fits if you want your email handled in the Netherlands on an IP of your own
• Works for apps sending around 25,000 emails a month at a steady rate

Look elsewhere if

• Skip it if you want a free plan or a trial, as there isn't one
• Pricey if you only send a little, since the license starts at €55 a month
• Tight if you need more than 1 IP or 1 sender domain: each costs extra, and over five domains means contacting the vendor
• Watch out: technical support is a separate €89 a month
• Watch out: prices are in euros and the page doesn't say whether VAT is included

MailerQ

• It is software you install and run on your own servers; the vendor describes it as on-premise, and it uses RabbitMQ and a MySQL or PostgreSQL database.
• Prices are in euros, per instance. Updates and support are an extra yearly charge of 20% of the license fee.
• The Regular license caps sending at 100K emails per hour and 10 domains.
• The pages do not name supported operating systems.

SMTPeter

• There is no free plan or trial on the pricing section.
• Prices are in euros; the page does not say whether VAT is included.
• Extra IPs or sender domains cost more, and more than five domains requires contacting the vendor.
• A technical support contract is sold separately at €89 a month.

MailerQ

Management console

A web console shows delivery attempts, queues, error logs and statistics per IP, target domain or tag, and lets you change deliverability settings.

Throttling and flood patterns

Sets delivery rates for each source IP and target domain, and slows or pauses sending when a receiving server answers with rate-limit messages.

IP warm-up schedules

Throttle schedules define the sending rate to use on each day for a new IP address.

Bounce and feedback processing

Response patterns classify bounces, process feedback loops and trigger follow-up actions such as retrying or failing a delivery.

Email authentication

Supports DKIM, SPF, DMARC, TLS and ARC, according to the vendor.

REST API and injection methods

Messages can be injected in five ways, including AMQP, and a REST API can pause or cancel selected deliveries.

SMTPeter

SMTP and REST API

Messages arrive over SMTP or a REST API, and the API also returns log files, statistics and archived messages.

Dedicated IP and Dutch hosting

The license includes one IP address, and the vendor says the infrastructure is hosted in the Netherlands.

Authentication and tracking

DKIM signing is available, along with SPF and DMARC support, link rewriting for click tracking and bounce interception.

Template store and editors

Templates are stored as JSON, editable in a drag-and-drop editor or an HTML editor, and selected through the API for personalized sends.

Archiving and DMARC reports

Every sent email is archived and viewable in the dashboard or API, which also shows DMARC reports and feedback-loop notifications.

MailerQ

• Regular€10,000

  one-time fee per instance

  Perpetual license: 100K emails per hour, 10 domains, management console. Updates and support cost €2,000 a year.

• Enterprise€25,000

  one-time fee per instance

  Perpetual license: unlimited emails per hour and domains, management console. Updates and support cost €5,000 a year.

SMTPeter

• SMTPeter license€55

  per month for up to 25,000 emails, 1 IP address and 1 sender domain

  Beyond 25,000 emails: €0.23 per 1,000 for the next 25,000, then €0.22, €0.17, €0.06 and €0.05 as volume rises. Extra IPs or domains are charged extra.