blocking - How to get around an ISP block on port 25 for SMTP -


yes, question has been answered in variety of ways, none of which, answered in way fit needs. so, therefore i'm asking mine specific situation.

i've tried, 5 or 6 different ways setting mail (smtp) server on spare computer @ home i've set run website. isp blocks several ports 80 , 25 allow hosting web servers, mail servers, ftp servers. etc. luckily, domain registrar had way forward traffic specific port used options in router port translation , redirect traffic 1 port specified in account settings on registrar's site go port 80 on web server computer, worked fine, , website up.

however, i've come find out default, when setting mx record can set mail server, system default sends traffic port 25. (so rather web server pointer can specify: 012.345.678.910:8080, mx record has mail.mydomain.com or mydomain.com. there no way in options (currently) specify port can website. so, guess 2 part question. 1. did happen choose crappy domain registrar; or specifically, capability offered default lot of other domain registrar's i'm missing out on? , 2. there other way make happen? isp charges , arm , leg business accounts unlock port 25, , i'd not have go route. understand can set smtp server listen , send out traffic on different port, me no if domain registrar's mx record still forwarding port 25 incoming mail. or advice on matter appreciated. thanks.

edit:

i left out obvious possibility messing setup in regard fact i've never set smtp server before i'm quite new this. sad, confused on how mail servers operate, there difference or possibility of isp blocking incoming traffic on port vice outgoing? mean is, confused in if i've set properly, should able receive (listen) or port 25 no matter what, , have send outgoing mail out on unblocked smtp port?

i've yet try sending out mail server due fact don't want have things set wrong , ip blacklisted, i've tried experimenting trying receive email , i've said, i've tried 5 or 6 (all confusing , seemingly incomplete or not detailed) tutorials on how set smtp server, , have yet incoming mail either. personal note, seems weird me out of several tutorials i've searched , read, not 1 bares similarity next regard first part of installing postfix; there, becomes different. doesn't me understand doing wrong if indeed happening. continuity, did go http://port25.icannotconnect.com/ , did indeed "blocked".

thanks again.

interesting question. seem understand how smtp works far mx records, ip addresses, , port 25 (which standard port smtp servers accept connections on other smtp servers).

i think referring domain registrar web site http redirect. sounds must have record domain pointing ip address of web server @ registrar, , web servers http (301 or 3012) redirect home ip address on port 8080. unfortunately, there not similar type of redirect in smtp protocol.

as workaround considerably less $50/month, might want setup mail server on linux cloud server. linux cloud servers @ rackspace start @ around $16/month, , have static ip without blocked ports: http://www.rackspace.com/cloud/servers/


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