Email delivery issues with Mailgun: Messages marked as sent but not received

Hey everyone,

I’m having a weird problem with Mailgun and I’m hoping someone can help me out. My app sends confirmation emails through Mailgun, but most of them aren’t showing up in people’s inboxes.

I’ve only sent 13 messages in the last month, all to different Gmail accounts. Only 3 actually made it through. The rest? Poof! Gone into thin air.

The strangest part is that Mailgun’s logs say these emails were ‘accepted’ and ‘delivered’. But they’re clearly not reaching their destination. I’ve double-checked spam folders and everything.

Sometimes, the emails do show up, but they’re super late - like 30 to 40 minutes after they’re sent.

Has anyone run into something like this before? Any ideas on what might be going on or how to fix it? I’m scratching my head here!

yo, ive had similar probs with mailgun. try checkin ur IP reputation - if its bad, emails might not get thru. also, make sure ur not on any blacklists. sometimes ISPs block entire IP ranges.

if nothin else works, maybe switch to a different email service provider? sendgrid or amazon ses could be worth a shot

I’ve encountered similar issues with Mailgun before. One thing to check is your domain’s DNS settings. Make sure your SPF and DKIM records are correctly configured. These authentication protocols can significantly impact email deliverability.

Another potential culprit could be your sender reputation. Even with a low volume of emails, if previous messages were marked as spam, it could affect future deliveries. Consider using Mailgun’s Inbox Placement feature to test your emails across different providers.

Lastly, review your email content. Certain words or phrases might trigger spam filters. Try adjusting your email templates and see if it improves delivery rates.

If all else fails, reaching out to Mailgun support directly might be your best bet. They can provide more specific insights into your account’s performance and potential issues.

I’ve been there, mate. Mailgun can be a real headache sometimes. Have you considered the possibility of Gmail’s bulk sender guidelines playing a role here? Even with low volume, if your domain is new or lacks proper authentication, Gmail might be extra cautious.

One thing that worked for me was gradually ramping up my sending volume and maintaining consistent sending patterns. It helps build trust with email providers. Also, don’t forget to monitor your email content closely. I once had a seemingly innocent keyword triggering spam filters without realizing it.

If you’re still stuck, you might want to look into email warm-up services. They can help improve your sender reputation over time. Just remember, patience is key when dealing with email deliverability issues. It’s a bit of a dark art, really.