Hello, dear support. Recently I have ordered hosting over Hosting24. Inside the panel there was an option of installing AbanteCart. I like how the things look so far but there seems to be a problem. Even when the SMTP details are entered correctly  there seems to be a problem and the script can't send e-mails. I have contacted my hosting support and this is the reply i got.

We have investigated the issue with our System Department and it seems that the issue is with your script. Even though we have edited all the details inside your AbanteCart admin area to match our server configuration, these are the errors that appeared inside Mail Server logs when using port 587:

2015-04-22 05:13:20 H=(v****.n*t) [*****]:54619 F= rejected RCPT : SMTP AUTH is required for message submission on port 587
2015-04-22 05:13:20 SMTP connection from (v****.n*t) [*****]:54619 closed by DROP in ACL

And these errors appeared when using port 25:

2015-04-22 05:16:06 H=(v****.n*t) [*****]:39165 F= rejected RCPT : Please turn on SMTP Authentication in your mail client. (v****.n*t) [*****]:39165 is not permitted to relay through this server without authentication.
2015-04-22 05:16:06 H=(v****.n*t) [*****]:39167 F= rejected RCPT : Please turn on SMTP Authentication in your mail client. (v****.n*t) [*****]:39167 is not permitted to relay through this server without authentication.
2015-04-22 05:16:06 SMTP call from (v****.n*t) [*****]:39167 dropped: too many syntax or protocol errors (last command was "To: b*****m@abv")
2015-04-22 05:16:06 SMTP call from (v****.n*t) [*****]:39165 dropped: too many syntax or protocol errors (last command was "To: b*****m@abv")

For some reason your script is using wrong email accounts even though they are not listed inside your Admin Area. This might be simply cached data, but you should consult regarding this with the software developers in any case.

Please contact us if you have further questions, comments or concerns.