Deliverability Forum

Welcome to Seasoned-Mailgunners and newbies, this forum is built for solely for customer to customer assistance, interactions, and discussions about improving email deliverability.

Did you find a golden trick to making sure you hit inboxes? Share it here! Ran into a deliverability issue but just can’t find a way around it? This is for you too.

Share hands-on knowledge to your fellow Mailgunners and be remember to be courteous of others.

Please note: This forum is not for immediate customer support. If you have a support issue please submit a support ticket or email help@mailgun.com.

  1. Email to yahoo is not being delivered due to shared ip bad reputation

    I signed up for a free account in early January. I got an email from Sam saying to post feedback in here even if it is negative. So far overall it's a good service except for this problem. Initially I hesitated to complain about this because I have a free account but if I were to convert to a paid account this problem might inhibit me from doing so and instead find a different provider.

    Here's the problem. I have some wordpress sites and I integrated mailgun as the smtp sender for either contact forms or registered site users. I…

    39 votes
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    30 comments  ·  Reputation Management  ·  Flag idea as inappropriate…  ·  Admin →
  2. I want to adjust retry interval, which is currently preset and hard coded by Mailgun

    Problem:
    Mailgun is currently trying to deliver this e-mail once every five minutes and getting a temporary failure each time, presumably because the greylisting settings at the remote end require a longer retry interval.

    How can we set the retry interval?
    "delivery-status" -> "retry-seconds"
    The retry interval is hardcoded into Mailgun environment and can not be changed.
    Adjusting the value is currently not supported.

    1 vote
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    0 comments  ·  Reputation Management  ·  Flag idea as inappropriate…  ·  Admin →
  3. Automatically be notified of major deliverability issues like being blacklisted by some providers

    A noisy sender on the IP address we were sending on caused it to become listed on a problematic blacklist and rejected by all Outlook/hotmail email addresses. We only found out when a customer told us they weren't getting the password reset. It would be great to be notified about events like these so we could investigate sooner.

    13 votes
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    1 comment  ·  Blacklists  ·  Flag idea as inappropriate…  ·  Admin →
  4. change retry rules for mx failure

    Currently if an email is sent to a non existing domain, you report an MX error and then retry for hours. It should fail immediately.

    6 votes
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    1 comment  ·  Authentication (SPF/DMARC/DKIM)  ·  Flag idea as inappropriate…  ·  Admin →
  5. Show us the sender score/reputation.

    Reputation is everything in email delivery.

    From your own documentation: "One of the most important assets you have in the email world (much like the real world) is your reputation. If you do not have a good reputation tied to your domain and your IP address (“IP” used herein for abbreviation), your email will not reach your recipients’ inboxes." (https://documentation.mailgun.com/best_practices.html#reputation)

    It'd be nice to access the sender score [on a per domain basis] through the API. Knowing that info, directly, would give domain holders the warm fuzzies on their reputation without having to go elsewhere (senderscore.org).

    Marco @…

    7 votes
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    1 comment  ·  Reputation Management  ·  Flag idea as inappropriate…  ·  Admin →
  6. Stop using blacklisted servers to send mail for fixed IP accounts

    Fixed IP accounts should not use random server IPs to deliver mail when current server load is high. This results in emails not being delivered because the sending server IP is often blacklisted. Fixed IP accounts help improve sender reputation, and this is negated when mail is sent by a server that is blacklisted.

    7 votes
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    2 comments  ·  Blacklists  ·  Flag idea as inappropriate…  ·  Admin →
  7. Add blacklist check via DNSBL like http://www.blacklistalert.org/

    Add blacklist check via DNSBL like http://www.blacklistalert.org/ for each IP on each domain, make it available from UI and API

    4 votes
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    0 comments  ·  Blacklists  ·  Flag idea as inappropriate…  ·  Admin →
  8. Blacklist senders & domains

    Ability to blacklist a specific sender or a specific domain to avoid Mailgun to send emails to these. In this way one can avoid sending a "successfully received" email as replies to Twitter, Facebook and LinkedIn invites, plus to unsolicited senders (not necessarily spam, but unsolicited in the eyes of the Mailgun user).

    4 votes
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    1 comment  ·  Blacklists  ·  Flag idea as inappropriate…  ·  Admin →
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