i have a costumer that uses outlook express to check his email. He can recieve his emails but he cannot send. how can i do this for him pls if anybody could provide the coding for this.
i am using 2.8.26 version. thanks alot
you need to give him access to an smtp relay. You can put one on your network (Sendmail), use your upstream ISPs smtp server or buy a service, eg from http://www.gradwell.com
MikroTik doesn’t have a built in smtp relay.
well i have the smtp of my isp how could i configure it
Is your customer on your network? i.e. are you his ISP?
well his is my costumer but the email he use is from another isp
I think you need to learn about sending email as this is outside the scope of this forum
If you have him NAT-ed or route in other way that he may connect to anythingon net without limits, hes SMTP should work too.
It is more likely that SMTP server your customer is trying to use does not allow external connections to prevent abuse. Checkout what exact error message he gets.
All your network users will have to use the SMTP server of your internet connection. This is mostly to stop spam. You can virtually never send mail unless you are connected to the network of the SMTP server.
wel should i write a rule in the mikrotik to achieve this. for example the smtp of my isp is 10.0.0.12
and the smtp of the costumer who wants to use his email from another isp is 5.5.5.10
what he should put in his outlook and what i should put on my mikrotik
hzeid
Your customer needs 2 Outlook accounts setup, one for your network and one for the other network (ISP) In each account in Outlook he specifies which smtp relay he needs to use, the POP3 information is the same for each account.
Hope this Helps
Harvey
No you don’t need two setups. Just use the outgoing smtp server for all mail accounts.
With MT you can just do a forward rule so all traffic on port 25 will be redirected to whatever server IP address using NAT. That way it won’t matter what the user types in. They could have a ougoing server of kiss.my.ass and it would work so long as it used port 25 
True, but then when that same customer goes to use the other ISP and they have the wrong SMTP server (maybe yours) then they phone you up saying it does not work. I have found it better to to mess with peoples Internet feeds except maybe a bit of p2p shaping 
Educate you customer about smtp, maybe you could set up a SMTP with Auth then tell you customer that for $x a month they can use that from where-ever they are.
He may just need to turn on server authentication. Under the servers tab of Outlook, check the box that says “My server requires authentication” and use the full email address for the username.