Unable to send email using Skytomato email hosting account

If you are able to download the email but you are not able to send out email even though the SMTP information is correct, then one of the reason might due to your ISP is blocking port 25.


Kindly be informed that Skytomato email hosting used port 25 to send out email. If you configure your SMTP to used port 25, then when you send an email to any recipient, it will use port 25 to transmit the data to remote server. Therefore, if your ISP (internet service provider) is blocking the port 25, then the email will not go through to our server for delivery. Some ISPs believe that if they block port 25 to cut down the spam email to their network.


Kindly be informed that Skytomato only provide port 25 as our SMTP services. If you are not able to send out email due to they have block the port 25, you may use your ISP SMTP to send out the email.


If you are not sure what is your ISP SMTP server and port number, please consult with the authorities on this matter.


The below are list of ISP that block port 25 and their outgoing mail server name.


No ISP Outgoing Mail Server (ISP)
1 Adelphia smtp.blk.adelphia.net
2 Alltel mail.alltel.net
3 AOL smtp.aol.com
4 Aliant / NbTel smtp.nbnet.nb.ca, smtp.vibe.net, smtp.aibn.nb.ca
5 AT&T WorldNet Imailhost.worldnet.att.net
6 BCPL mail.bcpl.net
7 BellSouth mail.bellsouth.net
8 Bellatlantic.net smtpout.bellatlantic.net
9 Bestweb smtp.bestweb.net
10 BEV.net smtp.bev.net
11 Blacksburg.net smtp.blacksburg.net
12 BYU nm.byu.edu
13 Cableone mail.cableone.net
14 CalWeb smtp.calweb.com
15 Charm.net smtp.charm.net
16 Charter smtp.charter.net
17 Chicagonet.net mail.chicagonet.net
18 Citizen's Internet smtp.swva.net
19 Coastalnet mail2.coastalnet.com
20 Columbia smtp.columbia.edu
21 CompuServ smtp.site1.csi.com
22 CompuServe Classic mail.compuserve.com
23 Concentric smtp.concentric.net
24 Comcast/ATTBI smtp.comcast.net
25 Cox.net smtp.west.cox.net, smtp.east.cox.net
26 Crosslink smtp.crosslink.net
27 CU Boulder eces.colorado.edu
28 DCAnet postoffice.dca.net
29 DirecWay smtp.direcway.com
30 EarthLink mail.earthlink.net
31 Enter smtp.enter.net
32 Ezy smtp.ezy.et
33 Flashnet mail.flash.net
34 FloydVA.net mail.floydva.net
35 ISPWest smtp.ispwest.com
36 Ibm.net smtp1.ibm.net
37 Interaccess.com smtp.interaccess.com
38 ITOL mail.itol.com
39 Juno smtp.juno.com
40 Lycos email.1stup.com
41 Microsoft's MSN smtp.email.msn.com
42 MindSpring smtp.mindspring.com
43 MCI2000 mailrelay.internetmci.com
44 McLeodusa email.mcleodusa.net
45 MediaOne smtp.ce.mediaone.net
46 Mpower Communications smtp.mpowercom.net
47 Netcom.com smtp.ix.netcom.com
48 Netexpress.net netexpress.net
49 Netscape smtp.isp.netscape.com
50 Netvigator mail.netvigator.com
51 NetZero smtp.netzero.net
52 NRVi.net mail.nrvi.net
53 NTELOS mail.ntelos.net
54 NYU.edu is4.nyu.edu
55 Omega Communications smtp.i-plus.net
56 People PC mail.peoplepc.com
57 Prodigy Internet smtp.prodigy.net
58 PacBell mail.pacbell.net
59 PSI.net relay.smtp.psi.net, bbr0-f1.sna.com
60 PSU.edu smtp.psu.edu
61 PTD.net mail.ptd.net
62 RCN.com smtp.rcn.com
63 Rider.edu enigma.rider.edu
64 Road Runner (Hawaii) smtp-server.hawaii.rr.com
65 Road Runner (San Diego) mail.san.rr.com
66 SBC smtp.wans.yahoo.com, smtp.swbell.yahoo.com, smtp.snet.yahoo.com, smtp.sbcglobal.yahoo.com,smtp.prodigy.yahoo.com, smtp.pacbell.yahoo.com, smtp.nvbell.yahoo.com, smtp.flash.yahoo.com, smtp.ameritech.yahoo.com
67 Shaw Cable (Canada) mail.shawcable.com
68 Sonic.net mail.sonic.net See : http://www.sonic.net/support/faq/advanced/port_25.shtml
69 Sprynet smtp.sprynet.com
70 Sympatico.ca テつ
71 SDSU rohan.sdsu.edu
72 Shentel smtp.shentel.net
73 SpeakEasy mail.speakeasy.net
74 SprintPCS smtp.sprintpcs.com
75 Sysnet mail.sysnet.net
76 Telocity.com smtp.telocity.com
77 TM Streamyx smtp.streamyx.com
78 Ucsf.edu mail.ucsf.edu
79 UCCS smtp.uccs.edu
80 UCSD smtp.ucsd.edu
81 UMBC smtp.gl.umbc.edu
82 Velocityhsi.com mail.velocityhsi.com
83 Verio mail.verio.net
84 Virginia Tech smtp.vt.edu
85 Verizon/GTE(Dial-Up) smtp.verizon.net, smtp.vzavenue.net
86 Yahoo smtp.mail.yahoo.com
87 ZNET mail.znet.com
88 Ziplink smtp.ziplink.net


It is advisable for you to consult your ISP for the Outgoing mail server name and the port number. For TM Streamyx(Malaysia ISP) user, you may refer to the URL as below as we have provided alternative Port of SMTP port 587.

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