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SEMS

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Posts posted by SEMS


  1. Hello, 

    I am a developer for an app that leverages SendGrid for sending our emails from the system. The app does not send a large quantity of emails but it does send out important emails to users that can cause major issues if the email is not received. SendGrid has a Whitelabel System that I setup by adding CNAME entries. This has helped a bit but I still get complaints about random users not recieving emails and 99% of the time it's due to SpamCop. 

     

    I am not able to justify the purchase of a static IP from SendGrid, so I am wondering if there is anything else I can do to alleviate emails from getting blocked. Right now, we are stuck with the default behavior of SendGrid assigning IP addresses dynamically. Our system email DNS is sems.serdp-estcp.org and here are some of the many examples of SpamCop blocking emails...

    PM 550 spamcop.mimecast.org Blocked - see http://www.spamcop.net/bl.shtml?167.89.100.251. - https://community.mimecast.com/docs/DOC-1369#550

    554 5.7.1 Service unavailable; Client host [167.89.106.170] blocked using bl.spamcop.net; Blocked - see http://www.spamcop.net/bl.shtml?167.89.106.170.

    451 Blocked - see http://www.spamcop.net/bl.shtml?167.89.100.251

    550 Unable to add '123@email.com' because host 167.89.100.251 is listed on bl.spamcop.net

    554 5.7.1 Service unavailable; Client host [167.89.100.251] blocked using bl.spamcop.net; Blocked - see http://www.spamcop.net/bl.shtml?167.89.100.251

    550 spamcop.mimecast.org Blocked - see http://www.spamcop.net/bl.shtml?167.89.100.251. - https://community.mimecast.com/docs/DOC-1369#550

    554 5.7.1 Service unavailable; Client host [167.89.106.170] blocked using bl.spamcop.net; Blocked - see http://www.spamcop.net/bl.shtml?167.89.106.170. 

     

    Does anyone have any experience using SendGrid? Any input would be greatly appreciated.

     

    Thanks,

    SEMS Team.

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