Works with the SMTP plugin you already run
Your SMTP plugin delivers the mail. FlexSlowMail decides when.
FlexSlowMail adds scheduling, pacing and campaign lists on top of the SMTP plugin already installed on your site. No second sending service, no migration, nothing to reconfigure. Pick yours below.
Take 10% off FlexSlowMail Pro
Every supported SMTP plugin has its own code. Use the one that matches what you run — the discount applies to your first payment on any Pro plan, annual or lifetime.
How it works
Three steps, and nothing you already run changes
Install FlexSlowMail
Add the plugin alongside your existing SMTP plugin. Both stay active, and your current mail keeps sending exactly as it does today.
Point it at your SMTP plugin
FlexSlowMail detects what you have installed and hands delivery to it. Your credentials stay where they are — you never re-enter them.
Schedule the send
Build a list, set the pace and the sending window, and let the campaign run. FlexSlowMail meters it out; your SMTP plugin does the delivering.
FluentSMTP
Send campaigns through any of your FluentSMTP connections
FluentSMTP lets you configure several named connections — one for transactional mail, another for bulk. FlexSlowMail reads that list and lets you choose which connection a sending profile uses, so campaign mail can ride a different route from your order receipts.
- ✓Pick a specific FluentSMTP connection per sending profile
- ✓Keep transactional and bulk mail on separate routes
- ✓Your FluentSMTP logs still capture every campaign send
WP Mail SMTP
Keep the mailer you already configured
Whatever WP Mail SMTP is pointed at — SendLayer, Brevo, Postmark, or a plain SMTP host — FlexSlowMail hands mail straight to it. You never re-enter an API key or verify a sending domain a second time.
- ✓No second set of credentials to manage
- ✓Works with every mailer WP Mail SMTP supports
- ✓Domain authentication stays exactly as it is
Post SMTP
Pair Post SMTP's delivery log with campaign-level retries
Post SMTP records what happened to every message it sends. FlexSlowMail keeps its own queue of failed campaign sends, so a bounce shows up in both places: the transport detail in Post SMTP, and the affected subscriber in FlexSlowMail, ready to retry.
- ✓Per-message transport detail stays in Post SMTP
- ✓Failed campaign recipients are queued for retry
- ✓Post SMTP's own failure alerts keep working
Easy WP SMTP
A light SMTP layer, with scheduling on top
Easy WP SMTP does one job well: getting mail off your server. FlexSlowMail adds the part it deliberately leaves out — lists, campaigns, and a sending pace that spreads a large send across hours instead of firing it all at once.
- ✓Nothing changes in your Easy WP SMTP setup
- ✓Add lists and campaigns without a new service
- ✓Throttle large sends to protect your sender reputation
Gmail SMTP
Stay under Gmail's daily sending limit
Google caps how much a Gmail or Workspace account may send in a day, and a campaign fired all at once is the quickest way to hit it. FlexSlowMail meters the send against a schedule you set, so a large list goes out over hours or days rather than tripping the limit.
- ✓Spread a single send across hours or days
- ✓Set a daily cap that matches your Google account
- ✓Your Gmail SMTP authentication is untouched
SMTP Mailer
Add campaigns to a minimal SMTP setup
SMTP Mailer is about as small as an SMTP plugin gets, which is exactly why it pairs well. FlexSlowMail supplies the list management, scheduling and delivery reporting without asking you to swap out the transport you already trust.
- ✓Keep your existing SMTP host exactly as configured
- ✓Lists, campaigns and analytics inside WordPress
- ✓No external marketing service required
Before you buy
Nothing to migrate
FlexSlowMail sits beside your SMTP plugin rather than replacing it. If you turn FlexSlowMail off tomorrow, your site keeps sending mail exactly as it does today.
All product names are trademarks of their respective owners. FlexSlowMail is an independent product and is not affiliated with, endorsed by, or sponsored by any of the plugins listed on this page.
Questions
Before you use the code
Do I still need my SMTP plugin?
Yes. FlexSlowMail schedules and paces the send; your SMTP plugin does the delivering. Both stay installed and active.
Does the discount apply to renewals?
No. Each partner code discounts your first payment only. Renewals bill at the standard rate, and a lifetime plan is a single payment, so the discount applies to the whole thing.
Can I switch SMTP plugins later?
Yes. FlexSlowMail detects what is installed and hands delivery to whichever supported plugin is active. Changing your mind later does not affect your licence.
Can I combine two codes?
No. Checkout accepts one coupon per purchase. Every partner code offers the same discount, so use whichever matches the plugin you run.
What if I do not use any of these plugins?
FlexSlowMail includes its own SMTP configuration, so it works on its own. The partner codes are for people who already have one of the six plugins above.
Keep your SMTP plugin. Add the scheduling.
Find the plugin you already run, take the discount that goes with it, and start sending on your own schedule.