Cant send to same domain after move to new IP

Though the plugin successfully sends millions of emails every day, there are a host of issues that can stop or delay emails on both the sending and receiving ends. It depends entirely on your local Server & WordPress configuration. You will need to investigate this issue for your particular local configuration.

See Contact Form 7 Email Issues. Most people that work through this information appear to be able to resolve their email sending & receiving issues.

If you find you need more detailed advice, after reading and working through the above links, please include a link to your Contact Form 7 form plus all your input in the Form and Mail sections of the CF7 interface. This should allow others to understand your actual problem and offer a possible solution.

Thank you davmerit,
I wasn’t sure how much to include on the initial post. CF7 has done great work on my site for 3 years until the 2 recent glitches. I’m kicking myself for not fully documenting the steps taken to fix this problem the first time around.

The forms are :
https://www.dgiinc.com/about-us/contact/
and
https://www.dgiinc.com/pcip/publishers-cataloging-in-publication-request-form/

Here are the Form and Mail sections:

<p><h5>Send an e-mail to DGI: </h5></p>
Fields marked with an asterisk(<font color=”red”>*</font>) are required.</p>
<div id=”contact” style=” width:400px;” >

<p><b><font color=”red”>*</font>Name:</b> [text* your-name] </p>

<p><b>Organization:</b> [text your-organization]</p>

<p><b><font color=”red”>*</font>Email:</b> [email* your-email] </p>

<p><b>Phone: </b> [tel Phonenumber]</p>

<p><b>Subject:</b> [text your-subject] </p></div>

<p><b>Area of interest:</b>
[checkbox* Checkbox “PCIP” “Cataloging” “Collection management” “Archives” “Data conversion” “Consultation” “Shelf-ready processing” “General inquiries”]</p>

<p><font color=”red”>*</font><b>Enter your message:</b>
[textarea your-message 50×10] </p>

<p>[submit “Send”]</p>

Mail:
To: [email protected], [email protected]
From: [your-name] at [your-organization] <[your-email]>
Subject: [your-subject]
No Additional headers
Message Body: <b>Message from [your-name] at [your-organization]:</b>
[your-message]

<b>I am interested in:</b>
[Checkbox]

<b>Phone:</b>
[Phonenumber]

—
This email was sent via the contact form on DGI’s website https://www.dgiinc.com/contact
Sent from IP address: [wpcf7.remote_ip]

No File Attachments and Use Mail(2) us not selected

Everything works as it should for the gmail address. Messages arrive in well under a minute after submission. It was all working for the dgiinc.com address until the web hosting company moved the site to a new server.

Aksimet Spam blocking has only stopped one message this month.

Office 365 Exchange Admin message trace shows nothing reaching the dgiinc.com email.

Contact Form DB looks like it records messages as it should — It’s a new product for me and was only activated today.

Activated WordPress plugins, all versions current except the last 2 with version noted:
Akismet
Black Studio TinyMCE Widget
BruteProtect
Google Analytics by Yoast
Redirection
TinyMCE Advanced
WooDojo
WooSidebars
WP Backup Plugin v. 3.8.8
WPtouch Pro v. 4.0.10

I have cPanel and WordPress access to the host. Would any other info be helpful? Could anyone suggest further things to check?

Thank you buzztone. Yes, some of the options that worked fine under the shared host are trouble on a new IP. Since the earlier post I’ve changed the forms to send from valid addresses in our domain:

From: [email protected]

Reply to:[your-name] at [your-organization] <[your-email]

Unfortunately the form behaved exactly as before — it can send to gmeil but not to dgiinc hosted by Microsoft.

I found success with the WP Mail SMTP plugin recommended in CF7 documentation. It showed transaction logs under the old configuration with time-outs trying to reach Microsoft’s servers. That still has me stumped but it’s a moot point. (not that I’d mind figuring that one out) My only concern is that the settings page for WP Mail SMTP leaves the user password visible. It’s v.0.9.5 and the developer’s website seems to indicate he’s moved on to other things besides WP.

I’d recommend you use Postman SMTP Mailer/Email Log – it includes options for improved security.