Head-to-head · October 2026
WP Mail SMTP by WPForms vs ZDN Whitelist Outgoing Em…
WP Mail SMTP by WPForms comes out ahead, winning 7 of 7 head-to-head checks against ZDN Whitelist Outgoing Email.
WP Mail SMTP by WPForms
Is your WordPress site not sending emails? You’re not alone. 4+ million websites use WP Mail SMTP to send…
ZDN Whitelist Outgoing Email
ZDN Whitelist Outgoing Email prevents WordPress from accidentally sending emails to real users in development…
| Metric | WP Mail SMTP by WPForms | ZDN Whitelist Outgoing Em… |
|---|---|---|
| Active installs | 4M+ | <10 |
| Downloads (30 days) | 1.9M | 48 |
| Download trend | +205.4% | +26.3% |
| Rating | 4.8/5 | — |
| Reviews | 5,204 | 0 |
| Health score | 94/100 | 55/100 |
| Last updated | 7 days ago | 3 months ago |
| Tested up to | WP 7.1.3 | WP 7.0.7 |
| Support resolved | 74% | — |
| Requires PHP | 7.4+ | 7.4+ |
| First released | Sep 2007 | Jul 2026 |
Daily downloads, last 90 days
WP Mail SMTP by WPFormsZDN Whitelist Outgoing…
Choose WP Mail SMTP by WPForms if…
You care most about active installs, downloads (30 days) and download trend.
- One of the most-used plugins on the web — 4M+ active sites
- Loved by users — 4.8/5 from 5,204 reviews
- Actively developed — last update 7 days ago
- Tested with the latest WordPress (7.1)
- Responsive support — 74% of recent threads resolved
Choose ZDN Whitelist Outgoing Em… if…
You prefer its feature set and workflow — it holds its own on the fundamentals.
- Small user base (<10 active installs)
- Very few reviews so far
Both compete in: email
FAQ
WP Mail SMTP by WPForms vs ZDN Whitelist Outgoing Em…: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 6, 2026
Which is better, WP Mail SMTP by WPForms or ZDN Whitelist Outgoing Email?
WP Mail SMTP by WPForms comes out ahead, winning 7 of 7 head-to-head checks against ZDN Whitelist Outgoing Email. Choose WP Mail SMTP by WPForms if you care most about active installs, downloads (30 days) and download trend.
Is WP Mail SMTP by WPForms more popular than ZDN Whitelist Outgoing Email?
WP Mail SMTP by WPForms is the more popular of the two with 4M+ active installs, compared with <10 for ZDN Whitelist Outgoing Email.
Can I use WP Mail SMTP by WPForms and ZDN Whitelist Outgoing Email together?
Both plugins cover email, so most sites only need one. Running two plugins that do the same job can cause conflicts and slow your site down — pick the one that fits best and remove the other.
Are WP Mail SMTP by WPForms and ZDN Whitelist Outgoing Email free?
Yes. Both are free to download from the official WordPress.org plugin directory. Either may also offer paid upgrades from its developer.
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