Ladies and Gents,
When it comes to email I’m a user, not a techie, so this forum is the best resource I know of for help with this problem.
I have both a personal domain and a business domain with the same hosting company (1and1.com — might be relevant, might not). There are multiple mailboxes associated with each domain. For what it’s worth, my websites and blogs are also hosted on 1and1.com.
Naturally, I use shared servers; the cost for a dedicated server is way out of line both for the value and for my finances. However, this also means I’m subject to the vagaries of the various spam services who go strictly by IP address to determine whether a sender is a spammer.
Neither my business nor the organizations I volunteer for can tolerate email that’s not delivered because someone else on the same server might be a spammer. Comcast is the most notorious for delaying and eventually rejecting delivery, but there are others as well.
I doubt that I’m being identified as a spammer; aside from 1 message I just had to send to roughly 200 members of one organization (which I broke into bunches of 10 addresses at a time), at most I send monthly messages to groups with as many as (gasp!) 26 members. Thus, I suspect the problem is, as noted above, someone else on the same server.
Does anyone have any suggestions on how I can get my emails delivered reliably? This isn’t a constant problem, but it happens far too often.