Is it possible to use CDO libraries (classic ASP) to send mail to Office 365 / Exchange Online?Multifunction...
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Is it possible to use CDO libraries (classic ASP) to send mail to Office 365 / Exchange Online?
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I'm working on a migration to Office 365 / Exchange Online for a SMB company which until now has been running a local Exchange 2010 server; we're talking about ~25 mailboxes here.
However, there's a LOB application which sends messages via SMTP to Exchange, it's based on classic ASP and uses the quite old CDO libraries.
I know Exchange Online only accepts SMTP submissions when authentication is used, and only with TLS encryption; however, it looks like CDO doesn't support this: the most it can do is SSL, which Exchange Online used to support until some time ago, but it doesn't seem to support anymore.
There are several discussions lying around the Internet (including this very site and StackOverflow) which suggest using SSL to make this work; however, as I already said, this was only an option until some time ago: now Exchange Online only supports TLS for SMTP submissions.
I'm also perfectly aware of both possible workarounds, i.e. 1) using a local SMTP relay and 2) creating a receive connector in Exchange Online to allow unauthenticated relay from the company's public IP address; however, for reasons that should be obvious, I'd like to go the proper way, and have the application send its messages using SMTP authentication.
I'm looking for a definitive answer here: is it possible now to have a CDO-based application submit messages to Exchange Online? Or, more specifcically, is there any way for a CDO-based application to support SMTP authentication over a TLS connection?
ssl smtp microsoft-office-365 smtp-auth exchangeonline
edited Nov 16 '16 at 13:19
BastianW
2,66841433
asked Jan 28 '16 at 0:44
MassimoMassimo
53.2k44170282
bumped to the homepage by Community♦ 4 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
I'm working on a migration to Office 365 / Exchange Online for a SMB company which until now has been running a local Exchange 2010 server; we're talking about ~25 mailboxes here.
However, there's a LOB application which sends messages via SMTP to Exchange, it's based on classic ASP and uses the quite old CDO libraries.
I know Exchange Online only accepts SMTP submissions when authentication is used, and only with TLS encryption; however, it looks like CDO doesn't support this: the most it can do is SSL, which Exchange Online used to support until some time ago, but it doesn't seem to support anymore.
There are several discussions lying around the Internet (including this very site and StackOverflow) which suggest using SSL to make this work; however, as I already said, this was only an option until some time ago: now Exchange Online only supports TLS for SMTP submissions.
I'm also perfectly aware of both possible workarounds, i.e. 1) using a local SMTP relay and 2) creating a receive connector in Exchange Online to allow unauthenticated relay from the company's public IP address; however, for reasons that should be obvious, I'd like to go the proper way, and have the application send its messages using SMTP authentication.
I'm looking for a definitive answer here: is it possible now to have a CDO-based application submit messages to Exchange Online? Or, more specifcically, is there any way for a CDO-based application to support SMTP authentication over a TLS connection?
ssl smtp microsoft-office-365 smtp-auth exchangeonline
edited Nov 16 '16 at 13:19
BastianW
2,66841433
asked Jan 28 '16 at 0:44
MassimoMassimo
53.2k44170282
bumped to the homepage by Community♦ 4 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Feel free to migrate this question to StackOverflow if this seems more appropriate; I'm only posting it here now.
– Massimo
Jan 28 '16 at 0:45
stackoverflow.com/q/12812408/1068283
– Michael Hampton♦
Jan 28 '16 at 0:50
Thanks @MichaelHampton, that's one of the questions I already examined; however, it's specific to AWS (and also it's not really clear about whether SSL is enough or TLS is actually required). I need a definite answer about if this can (or can't) possibly work with Exchange Online, in order to tell some developers "either you switch to more recent libraries or you won't be able to send anything anymore, and please don't blame the migration about this, because it's your fault if you're still stuck with classic ASP".
– Massimo
Jan 28 '16 at 0:58
Ah, but that wasn't in your question! I had no way of knowing that you had read it. Anyway, there are apparently other third party libraries capable of this. But CDO does not seem to be.
– Michael Hampton♦
Jan 28 '16 at 1:16
add a comment |
I'm working on a migration to Office 365 / Exchange Online for a SMB company which until now has been running a local Exchange 2010 server; we're talking about ~25 mailboxes here.
However, there's a LOB application which sends messages via SMTP to Exchange, it's based on classic ASP and uses the quite old CDO libraries.
I know Exchange Online only accepts SMTP submissions when authentication is used, and only with TLS encryption; however, it looks like CDO doesn't support this: the most it can do is SSL, which Exchange Online used to support until some time ago, but it doesn't seem to support anymore.
There are several discussions lying around the Internet (including this very site and StackOverflow) which suggest using SSL to make this work; however, as I already said, this was only an option until some time ago: now Exchange Online only supports TLS for SMTP submissions.
I'm also perfectly aware of both possible workarounds, i.e. 1) using a local SMTP relay and 2) creating a receive connector in Exchange Online to allow unauthenticated relay from the company's public IP address; however, for reasons that should be obvious, I'd like to go the proper way, and have the application send its messages using SMTP authentication.
I'm looking for a definitive answer here: is it possible now to have a CDO-based application submit messages to Exchange Online? Or, more specifcically, is there any way for a CDO-based application to support SMTP authentication over a TLS connection?
ssl smtp microsoft-office-365 smtp-auth exchangeonline
edited Nov 16 '16 at 13:19
BastianW
2,66841433
asked Jan 28 '16 at 0:44
MassimoMassimo
53.2k44170282
I'm working on a migration to Office 365 / Exchange Online for a SMB company which until now has been running a local Exchange 2010 server; we're talking about ~25 mailboxes here.
However, there's a LOB application which sends messages via SMTP to Exchange, it's based on classic ASP and uses the quite old CDO libraries.
I know Exchange Online only accepts SMTP submissions when authentication is used, and only with TLS encryption; however, it looks like CDO doesn't support this: the most it can do is SSL, which Exchange Online used to support until some time ago, but it doesn't seem to support anymore.
There are several discussions lying around the Internet (including this very site and StackOverflow) which suggest using SSL to make this work; however, as I already said, this was only an option until some time ago: now Exchange Online only supports TLS for SMTP submissions.
I'm also perfectly aware of both possible workarounds, i.e. 1) using a local SMTP relay and 2) creating a receive connector in Exchange Online to allow unauthenticated relay from the company's public IP address; however, for reasons that should be obvious, I'd like to go the proper way, and have the application send its messages using SMTP authentication.
I'm looking for a definitive answer here: is it possible now to have a CDO-based application submit messages to Exchange Online? Or, more specifcically, is there any way for a CDO-based application to support SMTP authentication over a TLS connection?
ssl smtp microsoft-office-365 smtp-auth exchangeonline
ssl smtp microsoft-office-365 smtp-auth exchangeonline
edited Nov 16 '16 at 13:19
BastianW
2,66841433
asked Jan 28 '16 at 0:44
MassimoMassimo
53.2k44170282
edited Nov 16 '16 at 13:19
BastianW
2,66841433
asked Jan 28 '16 at 0:44
MassimoMassimo
53.2k44170282
edited Nov 16 '16 at 13:19
BastianW
2,66841433
edited Nov 16 '16 at 13:19
BastianW
2,66841433
edited Nov 16 '16 at 13:19
BastianW
2,66841433
2,66841433
asked Jan 28 '16 at 0:44
MassimoMassimo
53.2k44170282
asked Jan 28 '16 at 0:44
MassimoMassimo
53.2k44170282
asked Jan 28 '16 at 0:44
MassimoMassimo
53.2k44170282
53.2k44170282
bumped to the homepage by Community♦ 4 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 4 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Feel free to migrate this question to StackOverflow if this seems more appropriate; I'm only posting it here now.
– Massimo
Jan 28 '16 at 0:45
stackoverflow.com/q/12812408/1068283
– Michael Hampton♦
Jan 28 '16 at 0:50
Thanks @MichaelHampton, that's one of the questions I already examined; however, it's specific to AWS (and also it's not really clear about whether SSL is enough or TLS is actually required). I need a definite answer about if this can (or can't) possibly work with Exchange Online, in order to tell some developers "either you switch to more recent libraries or you won't be able to send anything anymore, and please don't blame the migration about this, because it's your fault if you're still stuck with classic ASP".
– Massimo
Jan 28 '16 at 0:58
Ah, but that wasn't in your question! I had no way of knowing that you had read it. Anyway, there are apparently other third party libraries capable of this. But CDO does not seem to be.
– Michael Hampton♦
Jan 28 '16 at 1:16
add a comment |
Feel free to migrate this question to StackOverflow if this seems more appropriate; I'm only posting it here now.
– Massimo
Jan 28 '16 at 0:45
stackoverflow.com/q/12812408/1068283
– Michael Hampton♦
Jan 28 '16 at 0:50
Thanks @MichaelHampton, that's one of the questions I already examined; however, it's specific to AWS (and also it's not really clear about whether SSL is enough or TLS is actually required). I need a definite answer about if this can (or can't) possibly work with Exchange Online, in order to tell some developers "either you switch to more recent libraries or you won't be able to send anything anymore, and please don't blame the migration about this, because it's your fault if you're still stuck with classic ASP".
– Massimo
Jan 28 '16 at 0:58
Ah, but that wasn't in your question! I had no way of knowing that you had read it. Anyway, there are apparently other third party libraries capable of this. But CDO does not seem to be.
– Michael Hampton♦
Jan 28 '16 at 1:16
Feel free to migrate this question to StackOverflow if this seems more appropriate; I'm only posting it here now.
– Massimo
Jan 28 '16 at 0:45
Feel free to migrate this question to StackOverflow if this seems more appropriate; I'm only posting it here now.
– Massimo
Jan 28 '16 at 0:45
stackoverflow.com/q/12812408/1068283
– Michael Hampton♦
Jan 28 '16 at 0:50
stackoverflow.com/q/12812408/1068283
– Michael Hampton♦
Jan 28 '16 at 0:50
Thanks @MichaelHampton, that's one of the questions I already examined; however, it's specific to AWS (and also it's not really clear about whether SSL is enough or TLS is actually required). I need a definite answer about if this can (or can't) possibly work with Exchange Online, in order to tell some developers "either you switch to more recent libraries or you won't be able to send anything anymore, and please don't blame the migration about this, because it's your fault if you're still stuck with classic ASP".
– Massimo
Jan 28 '16 at 0:58
Thanks @MichaelHampton, that's one of the questions I already examined; however, it's specific to AWS (and also it's not really clear about whether SSL is enough or TLS is actually required). I need a definite answer about if this can (or can't) possibly work with Exchange Online, in order to tell some developers "either you switch to more recent libraries or you won't be able to send anything anymore, and please don't blame the migration about this, because it's your fault if you're still stuck with classic ASP".
– Massimo
Jan 28 '16 at 0:58
Ah, but that wasn't in your question! I had no way of knowing that you had read it. Anyway, there are apparently other third party libraries capable of this. But CDO does not seem to be.
– Michael Hampton♦
Jan 28 '16 at 1:16
Ah, but that wasn't in your question! I had no way of knowing that you had read it. Anyway, there are apparently other third party libraries capable of this. But CDO does not seem to be.
– Michael Hampton♦
Jan 28 '16 at 1:16
add a comment |
1 Answer
1
active
oldest
votes
It makes me feel dirty to say this, but why not keep the EX2010 box and make it a hybrid deployment? You could continue to relay messages from your CDO libraries to SMTP receive on EX2010, then they would go across to O365 via the "on-premises to cloud" connector.
Then you can explain to the business that their old LOB application is causing increased infrastructure costs. Once they update the LOB app, then they get rid of an Exchange server on-premises, saving $$$.
answered Jan 28 '16 at 1:31
blaughwblaughw
2,0871616
If it turns out that an SMTP relay has to be used, at least in the short term, I'd probably prefer to use a third party SMTP relay like SendGrid or the like rather than maintain the on premises Exchange server just for this purpose.
– joeqwerty
Jan 28 '16 at 1:46
Or even IIS's built-in SMTP component, which is perfectly up to the task...
– Massimo
Jan 28 '16 at 1:51
Ah yes, IIS. True enough.
– joeqwerty
Jan 28 '16 at 2:04
add a comment |
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1 Answer
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1 Answer
1
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oldest
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active
oldest
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active
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votes
It makes me feel dirty to say this, but why not keep the EX2010 box and make it a hybrid deployment? You could continue to relay messages from your CDO libraries to SMTP receive on EX2010, then they would go across to O365 via the "on-premises to cloud" connector.
Then you can explain to the business that their old LOB application is causing increased infrastructure costs. Once they update the LOB app, then they get rid of an Exchange server on-premises, saving $$$.
answered Jan 28 '16 at 1:31
blaughwblaughw
2,0871616
If it turns out that an SMTP relay has to be used, at least in the short term, I'd probably prefer to use a third party SMTP relay like SendGrid or the like rather than maintain the on premises Exchange server just for this purpose.
– joeqwerty
Jan 28 '16 at 1:46
Or even IIS's built-in SMTP component, which is perfectly up to the task...
– Massimo
Jan 28 '16 at 1:51
Ah yes, IIS. True enough.
– joeqwerty
Jan 28 '16 at 2:04
add a comment |
It makes me feel dirty to say this, but why not keep the EX2010 box and make it a hybrid deployment? You could continue to relay messages from your CDO libraries to SMTP receive on EX2010, then they would go across to O365 via the "on-premises to cloud" connector.
Then you can explain to the business that their old LOB application is causing increased infrastructure costs. Once they update the LOB app, then they get rid of an Exchange server on-premises, saving $$$.
answered Jan 28 '16 at 1:31
blaughwblaughw
2,0871616
If it turns out that an SMTP relay has to be used, at least in the short term, I'd probably prefer to use a third party SMTP relay like SendGrid or the like rather than maintain the on premises Exchange server just for this purpose.
– joeqwerty
Jan 28 '16 at 1:46
Or even IIS's built-in SMTP component, which is perfectly up to the task...
– Massimo
Jan 28 '16 at 1:51
Ah yes, IIS. True enough.
– joeqwerty
Jan 28 '16 at 2:04
add a comment |
It makes me feel dirty to say this, but why not keep the EX2010 box and make it a hybrid deployment? You could continue to relay messages from your CDO libraries to SMTP receive on EX2010, then they would go across to O365 via the "on-premises to cloud" connector.
Then you can explain to the business that their old LOB application is causing increased infrastructure costs. Once they update the LOB app, then they get rid of an Exchange server on-premises, saving $$$.
answered Jan 28 '16 at 1:31
blaughwblaughw
2,0871616
It makes me feel dirty to say this, but why not keep the EX2010 box and make it a hybrid deployment? You could continue to relay messages from your CDO libraries to SMTP receive on EX2010, then they would go across to O365 via the "on-premises to cloud" connector.
Then you can explain to the business that their old LOB application is causing increased infrastructure costs. Once they update the LOB app, then they get rid of an Exchange server on-premises, saving $$$.
answered Jan 28 '16 at 1:31
blaughwblaughw
2,0871616
answered Jan 28 '16 at 1:31
blaughwblaughw
2,0871616
answered Jan 28 '16 at 1:31
blaughwblaughw
2,0871616
answered Jan 28 '16 at 1:31
blaughwblaughw
2,0871616
2,0871616
If it turns out that an SMTP relay has to be used, at least in the short term, I'd probably prefer to use a third party SMTP relay like SendGrid or the like rather than maintain the on premises Exchange server just for this purpose.
– joeqwerty
Jan 28 '16 at 1:46
Or even IIS's built-in SMTP component, which is perfectly up to the task...
– Massimo
Jan 28 '16 at 1:51
Ah yes, IIS. True enough.
– joeqwerty
Jan 28 '16 at 2:04
add a comment |
If it turns out that an SMTP relay has to be used, at least in the short term, I'd probably prefer to use a third party SMTP relay like SendGrid or the like rather than maintain the on premises Exchange server just for this purpose.
– joeqwerty
Jan 28 '16 at 1:46
Or even IIS's built-in SMTP component, which is perfectly up to the task...
– Massimo
Jan 28 '16 at 1:51
Ah yes, IIS. True enough.
– joeqwerty
Jan 28 '16 at 2:04
If it turns out that an SMTP relay has to be used, at least in the short term, I'd probably prefer to use a third party SMTP relay like SendGrid or the like rather than maintain the on premises Exchange server just for this purpose.
– joeqwerty
Jan 28 '16 at 1:46
If it turns out that an SMTP relay has to be used, at least in the short term, I'd probably prefer to use a third party SMTP relay like SendGrid or the like rather than maintain the on premises Exchange server just for this purpose.
– joeqwerty
Jan 28 '16 at 1:46
Or even IIS's built-in SMTP component, which is perfectly up to the task...
– Massimo
Jan 28 '16 at 1:51
Or even IIS's built-in SMTP component, which is perfectly up to the task...
– Massimo
Jan 28 '16 at 1:51
Ah yes, IIS. True enough.
– joeqwerty
Jan 28 '16 at 2:04
Ah yes, IIS. True enough.
– joeqwerty
Jan 28 '16 at 2:04
add a comment |
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Feel free to migrate this question to StackOverflow if this seems more appropriate; I'm only posting it here now.
– Massimo
Jan 28 '16 at 0:45
stackoverflow.com/q/12812408/1068283
– Michael Hampton♦
Jan 28 '16 at 0:50
Thanks @MichaelHampton, that's one of the questions I already examined; however, it's specific to AWS (and also it's not really clear about whether SSL is enough or TLS is actually required). I need a definite answer about if this can (or can't) possibly work with Exchange Online, in order to tell some developers "either you switch to more recent libraries or you won't be able to send anything anymore, and please don't blame the migration about this, because it's your fault if you're still stuck with classic ASP".
– Massimo
Jan 28 '16 at 0:58
Ah, but that wasn't in your question! I had no way of knowing that you had read it. Anyway, there are apparently other third party libraries capable of this. But CDO does not seem to be.
– Michael Hampton♦
Jan 28 '16 at 1:16