Meet your deliverability peers at the Port25 summit, 20 September 2018, Amsterdam

This year too, Postmastery is the Premier Platinum Sponsor of the Port25 Summit. As co-organiser Postmastery’s complete team will be there to meet you. The Port25 Summit will be a highly interactive event. It brings together industry representatives, email deliverability experts, technology vendors, and senior email professionals to explore and discuss the trends that will […]

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Categories: General, PowerMTA

Postmastery supports SendGrid clients with multiple webhook endpoints

Postmastery provides delivery monitoring and optimisation services on top of various email delivery environments. Sometimes we offer this service on top of on-premises MTA (like PowerMTA or EmailSuccess) and sometimes on top of cloud-based ESP’s (like Mailchimp or Smartfocus). A prerequisite of delivery monitoring and optimization services, is to get the right data points like […]

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Categories: Authentication, General, Sendgrid, Solutions

Delivery issues at LaPoste.net resolved

On Friday April 6, 2018, Postmastery’s Email Delivery Analytics detected serious delivery issues at LaPoste.net. The most frequent SMTP errors we detected were: 421 4.3.2 No system resources 421 4.3.2 All server ports are busy 451 4.7.1 Service unavailable – try again later 421 4.7.0 lpn-prd-vrin0xx Error: too many errors 421 4.4.2 lpn-prd-vrin0xx Error: timeout […]

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Categories: Deliverability, General, Providers

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