Some thoughts, suggestions and a question
Let me start by saying I have been in the computer biz for 30 years, I use Macs and support both Macs and PCs, I use a number of cloud based accounts and the most reliable for me has been Yahoo, Gmail next but I don't like the interface as much so Yahoo is my choice. I also work with a lot of designers who send large attachments, FTP and sites like dropbox are good options.
Personally with my email I have had few issues that I am aware of. I prefer cloud based email and have for years because I can get to my mail from any machine I am working on, home, clients, friends and I don't have to be concerned about backing it up. I have seen growing email issues with clients, mostly ones on PC's, some Macs, using MS based email clients.
As to suggestions first it seems to me there is a business opportunity her for guaranteed mail delivery and tracking. If anyone know of one I would like to know. Gmail does a good job of aggregating email addresses but getting any tech support response is nil.
I would like to know if anyone out there has had good or bad experience with domain hosts like Hostgator or GoDaddy.
First thing for MS client users to check is their rules and block lists, if the user is reporting marking an address as spam it may block for that domain as well, also go to your ISPs web base mail login and check there I found that one ISP had apparently picked up on the spam marking the user had done and was blocking all of yahoo and gmail, took me 4 hours on the phone and 2 support elevations with the ISPs support to find that one.
Another thing to check is to make sure you have your authentication, configs and ports set the way your ISP wants them, if you can get a straight answer from them.
Switching from POP to IMAP is an option to solve some problems, but in my experience MS clients don't like IMAP and it can cause problems in some cases.
I also believe some companies filters are tweaked too high. This might be the case if you have particulate individuals or companies you can't send to.
Note also that individual and small business IP addresses are dynamically allocated IP addresses and suspect by spamhaus and other spamhauses, most ISPs pull from a pool and sometimes these are reallocated or change your IP, you can check your IP by going to
Don't be surprised if you are on spamhauses list, and requesting getting your IP whitelisted is not a good long term solution as unbeknown to you your ISP may reallocate you another. Even if you are on the list theoretically if you have authentication on you should be able to send, but not always. Paying for a static IP may be an option.
Once you have your IP you can check it here, another great tool
My experience in getting clients ISPs and the company that is blocking the send has been frustrating and with mixed success. I have one client who has issues sending to a particular company intermittently, if he resends 80% it will then go through but not always, his ISP, a small local, either has some server issues or could have worked with the receiving company to fix the issue, but they refused to communicate with them, instead they forced him to switch to IMAP which he hates. They could have worked it out needless to say I am advising him to switch ISPs.
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