Title: Using API with Post SMTP
Last modified: November 13, 2019

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# Using API with Post SMTP

 *  Resolved [Wild Jim](https://wordpress.org/support/users/smokingblends/)
 * (@smokingblends)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/using-api/)
 * Got it working. Great plugin!
    -  This topic was modified 6 years, 9 months ago by [Wild Jim](https://wordpress.org/support/users/smokingblends/).
    -  This topic was modified 6 years, 9 months ago by [Wild Jim](https://wordpress.org/support/users/smokingblends/).

Viewing 8 replies - 1 through 8 (of 8 total)

 *  Thread Starter [Wild Jim](https://wordpress.org/support/users/smokingblends/)
 * (@smokingblends)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/using-api/#post-12125285)
 * Unfortunately, This is not working at all. The messages are only sent once.
 * And after the fist one, none are delivered. Post SMTP states the e-mail was sent,
   they show up in the sendgrid.com log and they are never received at the e-mail
   address.
 * Just placed a test order and it was never sent to the customer or us.
 * We can not be the only people experiencing this.
    -  This reply was modified 6 years, 9 months ago by [Wild Jim](https://wordpress.org/support/users/smokingblends/).
    -  This reply was modified 6 years, 9 months ago by [Wild Jim](https://wordpress.org/support/users/smokingblends/).
 *  [shinerweb](https://wordpress.org/support/users/shinerweb/)
 * (@shinerweb)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/using-api/#post-12132584)
 * If SendGrid is showing them as being sent, then they must be leaving Post SMTP
   correctly.
 * That suggests the problem is with the receiving mail account blocking/refusing
   or junking the received emails.
 * Have you double checked your DKIM/SPF, Rev DNS, Domain Host and From: fields 
   are all correct?
 *  Thread Starter [Wild Jim](https://wordpress.org/support/users/smokingblends/)
 * (@smokingblends)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/using-api/#post-12133176)
 * Hey [@shinerweb](https://wordpress.org/support/users/shinerweb/),
 * You are correct. This plugin is not the problem.
 * We are in contact with SendGrind. This is the fist time we have used an API and
   would like to continue to do so. But if only 10% of the e-mails are accepted 
   by the recipients e-mail provider, we can’t.
 * We were hoping someone might be able to offer some ideas. Doesn’t Google offer
   a API solution?
 * It is very hard to believe other people who set up this plug in using the SendGrid
   “
   Free” API are not also losing e-mails.
 * We are only sending orders to the customer and ourselves from wordpress and test
   e-mails.
 * As far as this ( “DKIM/SPF, Rev DNS, Domain Host” ) I am not sure exactly what
   you are referring to. Where would we be filling out that information?
 * Thanks for the help.
 *  [yehudah](https://wordpress.org/support/users/yehudah/)
 * (@yehudah)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/using-api/#post-12136715)
 * Hi,
 * Contact me here:
    [https://postmansmtp.com/contact/](https://postmansmtp.com/contact/)
 *  Thread Starter [Wild Jim](https://wordpress.org/support/users/smokingblends/)
 * (@smokingblends)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/using-api/#post-12136895)
 * Hey [@yehudah](https://wordpress.org/support/users/yehudah/),
 * Thanks we will certainly do that.
 * [@shinerweb](https://wordpress.org/support/users/shinerweb/) When we signed up
   for sendgrind there was no mention of any of these things.( “DKIM/SPF, Rev DNS,
   Domain Host” ). They are important and would result in a higher % of e-mail getting
   delivered.
 * After a half dozen messages with support someone mentioned that it was not set
   up in our account.They also let us know that some of the shared IPs their API
   was using to send e-mails were blacklisted.
 * If you are using your e-mail to send orders to customers or customer service,
   you may lose a % of them using a free API ( depending on the API ).
    -  This reply was modified 6 years, 9 months ago by [Wild Jim](https://wordpress.org/support/users/smokingblends/).
 *  Thread Starter [Wild Jim](https://wordpress.org/support/users/smokingblends/)
 * (@smokingblends)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/using-api/#post-12138564)
 * [@yehudah](https://wordpress.org/support/users/yehudah/)
 * We attempted to try and setup a google API and started following this tutorial
   but Google API does not come up in the list of Possible APIs.
 * Does this require that you are using a gmail e-mail address?
 * mail.postmansmtp.com
 *  [yehudah](https://wordpress.org/support/users/yehudah/)
 * (@yehudah)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/using-api/#post-12142022)
 * Did you contact me?
 *  Thread Starter [Wild Jim](https://wordpress.org/support/users/smokingblends/)
 * (@smokingblends)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/using-api/#post-12142709)
 * Hey [@yehudah](https://wordpress.org/support/users/yehudah/)
 * Yes we did.

Viewing 8 replies - 1 through 8 (of 8 total)

The topic ‘Using API with Post SMTP’ is closed to new replies.

 * ![](https://ps.w.org/post-smtp/assets/icon-128x128.gif?rev=3209655)
 * [Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App](https://wordpress.org/plugins/post-smtp/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/post-smtp/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/post-smtp/)
 * [Active Topics](https://wordpress.org/support/plugin/post-smtp/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/post-smtp/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/post-smtp/reviews/)

 * 8 replies
 * 3 participants
 * Last reply from: [Wild Jim](https://wordpress.org/support/users/smokingblends/)
 * Last activity: [6 years, 9 months ago](https://wordpress.org/support/topic/using-api/#post-12142709)
 * Status: resolved