Thanks. I was afraid it might have been a problem with my own mail server. I have an email account with Site5 Webhosting that I use for my website feedback. I was afraid that maybe someone had been using a Site5 mail account for spamming, and got the entire Site5 mail server blacklisted. I do have a separate email account from my ISP, but I don't want it to be exposed to any more spam than it already is.
Reading between the lines the problem is arising from Yahoo's spam blocking algorithms and settings. It is also quite possible that some customer(s) of Site5 are sending out a lot of advertising to Yahoo addresses which is resulting in traffic from the Site5 being "
deprioritised". This is exactly the reason some SMTP administrators limit the number of addressees on messages and the total number of messages per day for any given account. Which in turn has created the bulk email industry and is making firms such as Constant Contact a LOT of $€¥£﷼₤ .
You might try contacting Site5 and reporting the problem. They are the ones that are being blocked and would carry a lot more weight with Yahoo than you would.
I did have a Yahoo mail account, but closed it out a couple of years ago, when they changed their terms of service. That was when they announced that they could harvest any information they wanted from the email message content, and I had to certify that I had received permission for this from everyone I've ever corresponded with. Yeah right. Goodbye Yahoo.
To be fair Yahoo is struggling to remain in business and dealing with rising costs, a shrinking number of paid users, and tight fisted advertisers. Yahoo's big competition used to be AOL and Google. AOL, like Yahoo, is a shadow of its former self in a market dominated by Google who was the first to openly announce and admit they would sell their data which created a financial colossus and funded the development of superior technologies. Yahoo is having to jump on the customer data selling train just to remain viable.
BTW I tried downloading DevonAgent Lite, but it won't run on my machine. I fire it up and it immediately quits. I'm running Sierra which should be compatible, according to their site.
When you open/launch DEVONAgent Lite the only thing that happens initially is a small icon (I am not even sure what it is supposed to resemble) appears on the Menu bar (no icon appears on the Dock). If you click on that icon a dropdown appears. Enter the search term and DevonAgent Lite submits a google search and opens your default browser to display the results.
Devonagent Express is initiated in a similar manner, but displays. the search results within Devonagent Express, offers a choice of search engines, offers a choice of filtered or unfiltered searches, excludes specified domains and links, and only opens the default browser to view a selected entry.
Devonagent Pro does all of the above, plus uses multiple search engines, searches n level deep, uses wildcard searches, has its own browser,
etc., etc.. In other words Devonagent Pro is a tool for professionals such as researchers and authors who are seriously
mining for information and can benefit from AI ranking ranking and filtering of search results. Devonagent Express is a tool for the average user who can benefit from some of the ranking and filtering of the Pro version and Lite adds everything to a search that you paid for (it is free 🤔).
By the way all three DevonAgent versions are available on the MacOS App Store.