The email delivery service that people actually like. We get your emails to the inbox—fast and reliably. By @ActiveCampaign.
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Heads up for PHP users:
If you send with Postmark using our PHP library or WordPress plugin, the PHP project released fixes for PHP2Shell (CVE-2026-109618 and CVE-2026-109619).
These are critical remote code execution vulnerabilities in PHP itself, and every PHP version from the last decade is affected. Nothing in Postmark’s library or plugin causes this issue, but any server running an unpatched version of PHP is at risk.
To fix it, upgrade to the patched release for your version:
PHP 8.5.12
PHP 8.4.27
PHP 8.3.36
PHP 8.2.35
PHP 8.1 and older no longer get updates from the PHP project.
If you’re on one of those versions, check with your vendor about backported fixes, or upgrade to a supported version.
For full details, see the official PHP security advisory: php.net/index.php#2026-10-21…
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Postmark retweeted
Super duper thanks to @postmarkapp for sponsoring our work ❤️
I've used Postmark for all my transactional emails for as long as i can remember
So nice to shill something you're already a loyal customer of 👊
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[Complete] Scheduled maintenance: brief data service restart: The maintenance is now complete. Thanks for your patience. status.postmarkapp.com/notic…
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[Underway] Scheduled maintenance: brief data service restart: The scheduled maintenance is now underway. We'll keep you updated on our progress. status.postmarkapp.com/notic…
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[Scheduled] Scheduled maintenance: brief data service restart: 6 Oct 21:00 EDT Expected duration: About 15 minutes, up to 20
We're restarting part of our data infrast... status.postmarkapp.com/notic…
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Our support team can work with you to confirm this, but it is likely that the IP address this request came from has previously been associated with malicious activity. Here are a few common practices that may be helpful in this case:
Add retry with exponential backoff on any 403 whose response body isn't JSON — that signature identifies an edge block rather than a Postmark API error. (Max 2–4 retries)
Establish a dedicated static egress for all outbound application traffic to ensure a predictable network identity. Moving away from shared dynamic IP allocations isolates your service's reputation and prevents third-party security edge blocks.
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You can email support@postmarkapp.com or fill out the form here: postmarkapp.com/contact
Will you please DM the ticket number so that I can escalate it?
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Let us know if you have any questions about Postmark @nikhilx22! We’d love to help you out.
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Congratulations to @adamwathan and the team!
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[Complete] Maintenance: The maintenance is now complete. Thanks for your patience. status.dmarcdigests.com/
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[Underway] Maintenance: The scheduled maintenance is now underway. We'll keep you updated on our progress. status.dmarcdigests.com/
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[Scheduled] Maintenance: 9 Sep 11:30 EDT We will be performing rescheduled maintenance on the free DMARC Digests application on September 9th between approximately 11:30-12:30pm ET. No customer impact is expected. status.dmarcdigests.com/
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