E.mails not getting sent.

[ivan edake 13]

I have been using an Acer Aspire 5732Z laptop for about 5 years now,I had only one E.Mail address and a long list of E.Mail contacts.About 2 years ago when E. Mailing a new contact he did not receive the E.Mail despite it being shown as sent.After checking and a lot of messing about I found that no E.Mails sent from this laptop with my E.Mail address on would reach him.However I then created a second E.Mail address and sent him a message from this address and this reached him every time,still using the same laptop.He also would receive messages sent from another laptop or tablet whichever E. Mail address I sent it from.As I could not rectify the problem I just put up with it.A couple of weeks ago the same problem has occurred with another new contact,E.Mails do not reach him using my first E.Mail address and the Acer laptop  but they reach him when using my second E.Mail address on the Acer ,but reach him using either address on my tablet.I am now wondering if the problem has occurred on other occasions like if I have E.Mailed somebody from an advert and not received a reply.Has anybody any idea what the problem might be?

[Zedders 10]

Christ mate, double check your space bar works after a full stop! Also commas are great.

[Ghozer 112]

What are the email addresses? ( only the bit after the @) are they the same? or similar?
and what's yours?

it could be that wherever you're sending to, has your email host (bit after the @) blacklisted for some reason, or your email address...

(I don't know the reason, there are countless possibilities)

[DeZeus 11]

Maybe youre e-Mail Servers can't recognize your E.Mail Address@es?

Might be User Error?

Or Set up Wrongly? Check with your IT Support?

 

 

(Could be A Myriad of Problems?)