Replies: 1

I’ve installed the plugin and followed the documentation for Gmail. Everything went smoothly as the docs written… until the part where I need to click “Allow plugin to send emails using your Google account”.

I always get Error400 during this process, so I decided to check the button’s href and found out that the client_id parameter is actually missing!

https://accounts.google.com/o/oauth2/auth?response_type=code&redirect_uri=http%3A%2F%2Fexample.com%2Fwp-admin%2Foptions-general.php%3Fpage%3Dwp-mail-smtp%26tab%3Dauth&client_id=&scope=https%3A%2F%2Fmail.google.com%2F&access_type=offline&approval_prompt=force&include_granted_scopes=true
(I’ve changed my domain name with a dummy one here just in case)

So I tried cheating my way by editing the href and inserted my client_id and then clicking the button like normal.

Get warned for unverified-whatever which I choose to ignore. And then presented with the ultimate decision of “Cancel” vs “Allow”. It was a tough decision.

After clicking “Allow”, I got redirected to the plugin’s settings page. But no Success Message (as described in the docs) were witnessed at this point, and the “Allow plugin to send emails using your Google account” doesn’t exist… nor anything else beyond it (save button, ‘please support us’ box, etc).

Similar situation also occurred in “Email Test” tab. Only 2 rows get rendered in this page: “Send To” and “HTML”, which is definitely not enough since the “Send Email” button is absent.

—
Error message “Fatal error: Call to undefined method Google_Client::fetchAccessTokenWithAuthCode() in /home/exampledotcom/public_html/wp-content/plugins/wp-mail-smtp/src/Providers/Gmail/Auth.php on line 102” appeared when I used debug mode, not sure how to fix it.
—

The “Misc” tab worked as usual though…

This problem persist even after removing and reinstalling the plugin… unless I checked the “…remove ALL WP Mail SMTP data upon plugin deletion…” option.

Tried redoing it 3 times (all with similar results) before I gave up and decided to ask for support here.

Replies: 0

Hello!

I have installed and configured your plugin in my site. When I test the plugin with my personal email I get the test email, but when I test the plugin with hr@ that is a google group i do not get the test email. I tested the hr@ group sending an email from a personal account and the group is receiving emails from external sources.

Pls help

Replies: 0

Hey there, first off i like this plugin. its the first one i found that can really do multisite.

The problem I am having is the text “note TLS is not STARTTLS”. So how do i get starttls? it appears that exchange server 2016 needs it to be starttls.
I had another mail plugin that did work, and it was using starttls from a dropdown. However that plugin was not multisite friendly.

I am going to see if can modify exchange server to do straight TLS. But does the plugin support starttls? if not why not? exchange would be one of the most popular mailservers.

Replies: 0

Hello,

My contact form7 submission delays when your plugin is active. It seems that there is a compatibility issue between those two plugins.

Replies: 0

Hi,
I am not able to send test email through WP Mail SMTP and when I click to view the full error Log for debugging, this is what i get

Versions:
WordPress: 4.9.9
WordPress MS: No
PHP: 5.5.38
WP Mail SMTP: 1.4.1

Params:
Mailer: mail
Constants: No

Server:
PHP.mail(): Yes
Apache.mod_security: No

Debug:
Mailer: Default (none)
PHPMailer was able to connect to SMTP server but failed while trying to send an email.

I am newbie at SMTP server setup. Can you help?

Replies: 0

We built a working prototype social media site for a client just recently with a heavily altered custom user role for public users.

With WP Mail SMTP activated and connected to Mailgun, users that register with Gmail addresses can’t access all the functionality that should be available to their role, like editing their profiles, adding and editing posts, and interacting with other users’ posts.

Again, this only affects users who registered with Gmail accounts while the plugin was active. With WP Mail SMTP deactivated, new users that register with Gmail addresses can access all functionality as expected.

Has anyone seen this kind of behavior before?

Also, I’m a super n00b to posting in the support forums, so please let me know if I need to change/move/etc. this thread. Thanks!

Replies: 0

Hi! I know that there is a similar theme here https://wordpress.org/support/topic/email-delivery-error-wp-mail-smtp-plugin-logged-this-error-during-the-last-time/ but it’s closed.

Im getting this error:
EMAIL DELIVERY ERROR: the plugin WP Mail SMTP v1.4.1 logged this error during the last time it tried to send an email:

Mailer: Other SMTP
PHPMailer was able to connect to SMTP server but failed while trying to send an email.
Please review your WP Mail SMTP settings in plugin admin area. Consider running an email test after fixing it.

This error disappears after sending a Test Email. But appears immediately after trying to send an email through the form on the page.

I flushed wp cache via W3 Total Cache plugin.

Replies: 0

Hello,
I’m sending out mails from several email ids from my website like admin@mywebsite.com, sales@mywebsite.com, hr@mywebsite.com.

My mails are being considered as spam by certain mail clients as I’m sending out from a php script.
So, I’m configuring SMTP mail for my WordPress website.
With this plugin, I noticed it gave option to configure only one email with it’s SMTP configurations.

The mails are actually notification mails triggered whenever someone submits a form on Wpforms.
Is it possible to trigger a mail from a different email address for each forms?
They all have the same SMTP configuration.

Please clarify.
Thank you 🙂

Replies: 0

why i am getting this error?
Versions:
WordPress: 5.0.3
WordPress MS: No
PHP: 5.4.45
WP Mail SMTP: 1.4.1

Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
Host: smtp.gmail.com
Port: 465
SMTPSecure: ssl
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)

Server:
OpenSSL: OpenSSL 1.0.2k-fips 26 Jan 2017
Apache.mod_security: No
SMTP Debug:
2019-02-04 09:29:25 Connection: opening to ssl://smtp.gmail.com:465, timeout=300, options=array (
)
2019-02-04 09:29:25 Connection: opened
2019-02-04 09:29:26 SERVER -> CLIENT: 220 smtp.gmail.com ESMTP y84sm44819951pfb.81 – gsmtp
2019-02-04 09:29:26 CLIENT -> SERVER: EHLO tecwagroup.com
2019-02-04 09:29:26 SERVER -> CLIENT: 250-smtp.gmail.com at your service, [103.76.228.114]
250-SIZE 35882577
250-8BITMIME
250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-CHUNKING
250 SMTPUTF8
2019-02-04 09:29:26 CLIENT -> SERVER: AUTH LOGIN
2019-02-04 09:29:26 SERVER -> CLIENT: 334 VXNlcm5hbWU6
2019-02-04 09:29:26 CLIENT -> SERVER: cHJpeWEuYXA3MDcwQGdtYWlsLmNvbQ==
2019-02-04 09:29:26 SERVER -> CLIENT: 334 UGFzc3dvcmQ6
2019-02-04 09:29:26 CLIENT -> SERVER: JiZhYW1pcmFtJiY=
2019-02-04 09:29:27 SERVER -> CLIENT: 534-5.7.14 Please log in via your web browser and then try again.
534-5.7.14 Learn more at
534 5.7.14 https://support.google.com/mail/answer/78754 y84sm44819951pfb.81 – gsmtp
2019-02-04 09:29:27 SMTP ERROR: Password command failed: 534-5.7.14 Please log in via your web browser and then try again.
534-5.7.14 Learn more at
534 5.7.14 https://support.google.com/mail/answer/78754 y84sm44819951pfb.81 – gsmtp
2019-02-04 09:29:27 SMTP Error: Could not authenticate.
2019-02-04 09:29:27 CLIENT -> SERVER: QUIT
2019-02-04 09:29:27 SERVER -> CLIENT: 221 2.0.0 closing connection y84sm44819951pfb.81 – gsmtp
2019-02-04 09:29:27 Connection: closed
2019-02-04 09:29:27 SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

Replies: 0

Hi WPForms,

I have an EC2 instance running Bitnami WordPress.

Your plugin WP-Mail-SMTP came pre-bundled.

Do you have any documentation on how to set-up your plugin with AWS SES, please?

Thanks

Replies: 0

There was a problem while sending the test email. How do I fix it?

Versions:
WordPress: 5.0.3
WordPress MS: No
PHP: 7.2.11
WP Mail SMTP: 1.4.1

Params:
Mailer: gmail
Constants: No
Client ID/Secret: Yes
Auth Code: Yes
Access Token: Yes

Server:
OpenSSL: OpenSSL 1.1.0g 2 Nov 2017
PHP.allow_url_fopen: Yes
PHP.stream_socket_client(): Yes
PHP.fsockopen(): Yes
PHP.curl_version(): 7.58.0

Debug:
Mailer: Gmail
{
“error”: {
“errors”: [
{
“domain”: “usageLimits”,
“reason”: “rateLimitExceeded”,
“message”: “User-rate limit exceeded. Retry after 2019-02-04T12:32:22.078Z (Mail sending)”
}
],
“code”: 429,
“message”: “User-rate limit exceeded. Retry after 2019-02-04T12:32:22.078Z (Mail sending)”
}
}

Replies: 0

Microsoft Office 365 has announced they’re ending support for 3DES this month, and while I have every confidence that WP Mail SMTP stays up to date on their TLS encryption cyphers, I would like to be able to put a client’s mind at ease with a definitive answer.

Thanks,
Grant

Replies: 0

Hello guys,

We’ve been using your plugin for a little while now and really love its simplicity.

Recently we discovered a weird behavior with 2 WooCommerce e-mails templates:

-> Admin new order notification
-> Customer new order receipt

These e-mail are signed by our hosting provider server instead of SendGrid, telling us they are not going through WP Mail SMTP. These are the automatic e-mails sent when a new order comes in.

I’m emphasizing on the automatic part here because when we fire these e-mails manually from the order back-end, they are indeed signed by our domain via Sendgrid. It’s when an order is filled and the notifications are sent automatically that they are not signed.

I dug up the send() function (line 548) in the WC_Mail class, hopefully it can help : https://docs.woocommerce.com/wc-apidocs/source-class-WC_Email.html#11-953

Any help to get those e-mails through Sendgrid would be appreciated!

Thank you

Replies: 0

Hi, great plugin,

when I set up my gmail api I dont have control over the from name and not sure where it is pulling it from? For instance the email account I am using is heyscoob.website@gmail.com and the from name is always heyscoob.website. Any idea how I can modify this and where. Using gravity forms and this name seem to override everything and I dont know where it is coming from. Any thoughts appreciated.

Thank you

• This topic was modified 24 minutes ago by mgiles79.

Replies: 0

Just to inform you that Contact Form 7 plugin is having issues with new Google’s CaptchaV3. WP Mail SMTP plugin reports successfully sent test emails, but when you try to fill in form it uses Captcha (v3 only with newest CF7) and it has serious problems.

In case someone was wondering, it’s *not* WP Mail SMTP issue.

Replies: 0

Error due to unsolicited and/or bulk e-mail.

This means the connection to your SMTP host was made successfully, but the host rejected the email.

Typically this error is returned when your are sending too many e-mails or e-mails that have been identified as spam.

Versions:
WordPress: 5.0.3
WordPress MS: No
PHP: 5.4.45
WP Mail SMTP: 1.4.1

Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP Error: data not accepted.SMTP server error: DATA END command failed Detail: Authentication required (From address: admin@alangautomation.com IP:
162.241.148.100 User: alangfav)
SMTP code: 550
Host: mail.alangautomation.com
Port: 25
SMTPSecure: string(0) “”
SMTPAutoTLS: bool(false)
SMTPAuth: bool(false)

Server:
OpenSSL: OpenSSL 1.0.2k-fips 26 Jan 2017
Apache.mod_security: No
SMTP Debug:
2019-02-08 07:32:06 Connection: opening to mail.alangautomation.com:25, timeout=300, options=array (
)
2019-02-08 07:32:06 Connection: opened
2019-02-08 07:32:06 SERVER -> CLIENT: 220-cp-ht-9.webhostbox.net ESMTP Exim 4.91 #1 Fri, 08 Feb 2019 07:32:06 +0000
220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.
2019-02-08 07:32:06 CLIENT -> SERVER: EHLO http://www.alangautomation.com
2019-02-08 07:32:06 SERVER -> CLIENT: 250-cp-ht-9.webhostbox.net Hello http://www.alangautomation.com [162.241.148.100]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-AUTH PLAIN LOGIN
250-STARTTLS
250 HELP
2019-02-08 07:32:06 CLIENT -> SERVER: MAIL FROM:
2019-02-08 07:32:06 SERVER -> CLIENT: 250 OK
2019-02-08 07:32:06 CLIENT -> SERVER: RCPT TO:
2019-02-08 07:32:06 SERVER -> CLIENT: 250 Accepted
2019-02-08 07:32:06 CLIENT -> SERVER: DATA
2019-02-08 07:32:06 SERVER -> CLIENT: 354 Enter message, ending with “.” on a line by itself
2019-02-08 07:32:06 CLIENT -> SERVER: Date: Fri, 8 Feb 2019 07:32:06 +0000
2019-02-08 07:32:06 CLIENT -> SERVER: To: admin@alangautomation.com
2019-02-08 07:32:06 CLIENT -> SERVER: From: Alang Automation
2019-02-08 07:32:06 CLIENT -> SERVER: Subject: WP Mail SMTP: Test email to admin@alangautomation.com
2019-02-08 07:32:06 CLIENT -> SERVER: Message-ID: <8d6c5f7ffaa764ce3b741303317c8eab@www.alangautomation.com>
2019-02-08 07:32:06 CLIENT -> SERVER: X-Mailer: WPMailSMTP/Mailer/smtp 1.4.1
2019-02-08 07:32:06 CLIENT -> SERVER: X-Mailer-Type: WPMailSMTP\Admin\Test
2019-02-08 07:32:06 CLIENT -> SERVER: MIME-Version: 1.0
2019-02-08 07:32:06 CLIENT -> SERVER: Content-Type: text/html; charset=UTF-8
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER: WP Mail SMTP Logo
2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER: Success
2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER: Congrats, test email was sent successfully!
2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER: Thank you for trying out WP Mail SMTP. We’re on a mission to make sure that your emails actually get delivered.
2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER: If you find this free plugin useful, please consider giving our sister plugin a try!
2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER: Signature
2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER: Jared Atchison
Lead Developer, WP Mail SMTP
2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:
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2019-02-08 07:32:06 CLIENT -> SERVER: WPForms Logo
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2019-02-08 07:32:06 CLIENT -> SERVER: Over 1 million websites use WPForms. See why it’s the fastest growing WordPress forms plugin in the market.
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2019-02-08 07:32:06 CLIENT -> SERVER:

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2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER: 2019-02-08 07:32:06 CLIENT -> SERVER: 2019-02-08 07:32:06 CLIENT -> SERVER: 2019-02-08 07:32:06 CLIENT -> SERVER: 2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER: 2019-02-08 07:32:06 CLIENT -> SERVER: Upgrade to WPForms Pro Today 2019-02-08 07:32:06 CLIENT -> SERVER: 2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:

2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER:
2019-02-08 07:32:06 CLIENT -> SERVER: .
2019-02-08 07:32:06 SERVER -> CLIENT: 550-Authentication required (From address: admin@alangautomation.com IP:
550 162.241.148.100 User: alangfav)
2019-02-08 07:32:06 SMTP ERROR: DATA END command failed: 550-Authentication required (From address: admin@alangautomation.com IP:
550 162.241.148.100 User: alangfav)
2019-02-08 07:32:06 SMTP Error: data not accepted.
Please copy only the content of the error debug message above, identified with an orange left border, into the support forum topic if you experience any issues.

sir help me to solve this issue

Replies: 0

Hi,

I’ve tried setting this up but I am running into several issues…

Issue 1: Once I filled in the Client ID, Secret and decided to click Authorise… it sent me to a Google error page because the request did not include the client ID.

Fix 1: I manually copied the client ID into the query / request and then the authorisation worked correctly.

Issue 2: The “Save” button is now missing on Settings page and the “Send” button is now missing on the email test page.

Issue 3: I am seeing the following error/notification:

EMAIL DELIVERY ERROR: the plugin WP Mail SMTP v1.4.1 logged this error during the last time it tried to send an email:

Mailer: Gmail
{
 "error": {
  "errors": [
   {
    "domain": "global",
    "reason": "required",
    "message": "Login Required",
    "locationType": "header",
    "location": "Authorization"
   }
  ],
  "code": 401,
  "message": "Login Required"
 }
}
Consider running an email test after fixing it.

Issue 4: I do not see “Internal” within the OAuth consent screen…

If I use the outdated “Post SMTP” it works fine doing either the SMTP route or the the Gmail API route, with the same exact credentials…

Replies: 0

Hi,

All the sites on our webserver are failing when connecting to our mail server. They used to work. All are using comodo certs as is the mail server.

Versions:
WordPress: 5.0.3
WordPress MS: No
PHP: 7.3.2-3+0~20190208150725.31+stretch~1.gbp0912bd
WP Mail SMTP: 1.4.1

Params:
Mailer: smtp
Constants: Yes
ErrorInfo: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
Host: mail1.ourmailserver.com
Port: 587
SMTPSecure: tls
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)

Server:
OpenSSL: OpenSSL 1.1.1a 20 Nov 2018
SMTP Debug:
2019-02-11 19:13:00 Connection: opening to mail1.ourmailserver.com:587, timeout=300, options=array ( ) 2019-02-11 19:13:00 Connection: opened 2019-02-11 19:13:00 SERVER -> CLIENT: 220 mail1.ourmailserver.com ESMTP ready 2019-02-11 19:13:00 CLIENT -> SERVER: EHLO http://www.ourwebserver.com 2019-02-11 19:13:00 SERVER -> CLIENT: 250-mail1.ourmailserver.com 250 STARTTLS 2019-02-11 19:13:00 CLIENT -> SERVER: STARTTLS 2019-02-11 19:13:00 SERVER -> CLIENT: 220 2.0.0 Start TLS 2019-02-11 19:13:00 SMTP Error: Could not connect to SMTP host. 2019-02-11 19:13:00 CLIENT -> SERVER: QUIT 2019-02-11 19:13:00 SERVER -> CLIENT: ,( ����ŷ1�A����ޖx��.?����WdC.UR�sk?����-�Зƿ���z �����U*z�H ,o���\,A����7*�w){8��)������i���8�̂ʯ��Φ� Vp�i6G��j)�fQ��ˇ@P�t��X�fo����*p�Ϳ6 �䮁������+2��Sq���r����!�Ȓ�Hb���NT�.�8Y0���?���D��� ���#��Stik.�US�.!�$-j���h���S݊Ƕ�M{R!�I 2019-02-11 19:13:00 SMTP ERROR: QUIT command failed: ,( ����ŷ1�A����ޖx��.?����WdC.UR�sk?����-�Зƿ���z �����U*z�H ,o���\,A����7*�w){8��)������i���8�̂ʯ��Φ� Vp�i6G��j)�fQ��ˇ@P�t��X�fo����*p�Ϳ6 �䮁������+2��Sq���r����!�Ȓ�Hb���NT�.�8Y0���?���D��� ���#��Stik.�US�.!�$-j���h���S݊Ƕ�M{R!�I 2019-02-11 19:13:00 Connection: closed

The mail server error log produces

SSL_do_handshake() failed (SSL: error:14037418:SSL routines:ACCEPT_SR_KEY_EXCH:tlsv1 alert unknown ca:SSL alert number 48) while in starttls state

Replies: 0

Hi, we need to add a bcc recipient to every outgoing e-mail. Where can we enable this option?

Replies: 0

Hello,
I use this plugin and it seems to work well. Generally my site is not a big mail sender but on occasion it gets triggered to send a mail to several hundred users.

Is there a way to count and throttle the way these emails go out ie if sent 80 emails in last 60 minutes hold next emails for send for 30mins or maybe queue all instructions and only send 1 email per minute. The ISP has a limit of 100 per hr.

If this is not possible with your plugin are there any others you might be aware of that could integrate with yours and have that sort of functionality?
Thanks