While testing v155 during upgrade from v151 on my development system, everything seems to work except I'm not getting the header logo to appear in local email clients when operating in SSL. I either get a blue question mark, or just the alternate image text. Funny thing is that my ISP web-based email client displays the logo correctly (I'm not sure how the file is accessed from outside my firewall). The email source has both plain text and html portions. The html base href and image src point to the correct file (https://<my domain>/email/<my header image file name>). The email clients are loading remote content, either manually or automatically. I can access the image directly using a browser using the same path. The image displays correctly when operating in non-SSL mode with the email source base href and image src pointing to http://<my domain>/email/<my header image file name>. I get the same behavior in both v151 and v155.
I don't know whether the problem is Zen Cart, the development server setup, or the email client setups. Does anyone have any suggestions on further troubleshooting to isolate the problem?
Development server is MAMP PRO on MacOS 10.11.6. PHP version 6.6.30. Apple Mail and Mozilla Thunderbird are my local email clients. Zen Cart email settings are smtpauth with SMTP email account mailbox set to a gmail account which forwards all email to my ISP email account. The test customer (me) has a ZC account set to HTML email preference.
Dave
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