shouldiuse.io

VERDICT

Should I use Mailster?

Mailster is an easy to use Email Newsletter Plugin for WordPress. Create, send and track your Newsletter Campaigns without hassle. - mailster.co

Depends. Buy it if you run a WordPress site and want newsletter sending without monthly SaaS fees. Skip it if you send at high volume, need managed deliverability, or won't keep the plugin updated and secured yourself.

Confidence

Medium. Based on 30+ public sources: official pages, reviews, and vulnerability databases. Source snippets were truncated, so a few claims rest on partial text.

Ratings

  • Value for money
  • Ease of use
  • Feature depth
  • Support quality
  • Security posture

Pricing

$89

One-time license

ModelNot disclosed
Monthly feesNot disclosed
HardwareNot disclosed
Free tierNo

Best for

  • Small WordPress sites
  • Budget-conscious newsletter senders
  • Bloggers wanting in-dashboard sending
  • Buyers who hate subscriptions

Not for

  • High-volume senders needing managed deliverability
  • Non-WordPress sites
  • Teams wanting vendor-run infrastructure and SLAs
  • Anyone unwilling to maintain plugin updates

Gotchas - check before you buy

medium

Ownership changed hands; verify update cadence before committing.

medium

You bring your own sending setup (Amazon SES/SNS bounce handling documented); deliverability is your job.

medium

Reflected XSS and local file inclusion existed in v4.0.6; running old versions is risky.

low

Don't confuse with 'WP Mailster', a different plugin with 13 patched CVEs.

Pros and cons

Pros

  • One-time $89 license, no recurring subscription
  • Drag-and-drop editor with 400+ templates
  • Create, send and track campaigns inside WordPress
  • Frequently recommended in WordPress Reddit threads
  • GDPR guidance documented in knowledge base

Cons

  • Support waits of four weeks reported by users
  • Emails can hit spam filters without proper setup
  • Ownership changed hands, raising continuity questions
  • Past XSS and LFI flaws require prompt updating

Sources & method

Analyzed 9/25/2026 - 12 sources - Several reported vulnerabilities (reflected XSS, local file inclusion) around v4.0.6; keep the plugin updated.

official x3review x6security x2news x1
  • Reflected XSS in Mailster plugin 4.0.6, Reflected cross-site scripting vulnerability logged in Patchstack's database for the Mailster plugin.
  • Local file inclusion in 4.0.6, Local file inclusion vulnerability reported for the Mailster Email Newsletter plugin version 4.0.6.
  • Input validation vulnerability, Input validation vulnerability reported for the Mailster WordPress plugin.

Key stats

  • Value for money: 4/5

    Rating

  • $89

    Starting price

  • 12

    Sources

  • Analyzed

  • Value for money: 4/5. One-time $89 beats recurring SaaS fees
  • Ease of use: 4/5. Drag-and-drop editor, marketed and reviewed as easy
  • Feature depth: 4/5. Autoresponders, tracking, 400+ templates
  • Support quality: 2/5. Users report weeks-long support waits
  • Security posture: 2/5. XSS and LFI flaws reported around v4.0.6
  • $89 Starting price One-time license, not a subscription
  • 400+ Email templates Included template library
  • 7,700+ Community size Per Mailster's support page
  • No Free tier Paid plugin; pricing FAQ says no subscription

Pricing

One-time license

$89

  • Single payment, explicitly not a subscription
  • Multiple packages offered on pricing page

Security

Several reported vulnerabilities (reflected XSS, local file inclusion) around v4.0.6; keep the plugin updated.

  • Reflected XSS in Mailster plugin 4.0.6Reflected cross-site scripting vulnerability logged in Patchstack's database for the Mailster plugin.⁹
  • Local file inclusion in 4.0.6Local file inclusion vulnerability reported for the Mailster Email Newsletter plugin version 4.0.6.10
  • Input validation vulnerabilityInput validation vulnerability reported for the Mailster WordPress plugin.

What users say

Users praise the value for the price and ease of use, but some report support delays and weigh it against standalone email services.

“I use mailster, works well”
Reddit, r/Newsletters
“Awful performance and support”
WordPress.org support forums
Full analysis

Based on 30+ public sources: official pages, reviews, and vulnerability databases. Source snippets were truncated, so a few claims rest on partial text.

Solid one-time-$89 WordPress newsletter plugin for small lists; deliverability and security upkeep are on you.

Methodology

Based on 30+ public sources: official pages, reviews, and vulnerability databases. Source snippets were truncated, so a few claims rest on partial text.

Sources

  1. Mailster official sitemailster.co
    official
  2. Mailster pricing pagemailster.co
    official
  3. Mailster templates (400+)mailster.co
    official
  4. WP Mayor Mailster reviewwpmayor.com
    review
  5. Mailster vs Mailchimp cost comparisoninboxreads.co
    review
  6. Reddit: Email marketing recommendationsreddit.com
    review
  7. WordPress.org support: Awful performance and supportwordpress.org
    review
  8. Sender.net: WordPress email marketing (ownership change)sender.net
    news
  9. Patchstack: Mailster 4.0.6 reflected XSSpatchstack.com
    security
  10. Acunetix: Mailster 4.0.6 local file inclusionacunetix.com
    security
  11. Alternatives.co Mailster pricingalternatives.co
    review
  12. Blogvault: MailPoet vs Mailsterblogvault.net
    review

Rate this review

Anonymous. You can change your vote.

Loading votes…

Comments

One queue. No nested comments. Give a display name first. Limit: 200 words per comment and 7 comments per day. You can edit or delete yours.

Save a name to write a comment.

0 / 200 words

No comments yet.